The gas used in sodium vapour lamp is

The gas used in sodium vapour lamp is 

(1) argon (2) neon (3) nitrogen (4) oxygen
by

1 Answer

Answer :

Argon
by

Related questions

In sodium vapour lamp the function of the leak transformer is

Description : In sodium vapour lamp the function of the leak transformer is (1) To stabilize the arc (2) To increase the supply voltage (3) Both (a) and (b) (4) None of the above 

Last Answer : C

What is the difference between a sodium vapour lamp, Which gives out a yellowish colour illumination, and a mercury vapour lamp that gives out a white colour illumination?

Description : What is the difference between a sodium vapour lamp, Which gives out a yellowish colour illumination, and a mercury vapour lamp that gives out a white colour illumination?

Last Answer : Answer I: The light in Sodium Vapour lamp is from an atomic emission process whereas in Mercury Vapour Lamp it is, finally, from fluorescence emission. The mechanism of light emission in a sodium ... from a fluorescent lamp is moderate (60 lumens/watt) while the color-rendering index is high.

Which of the following vapour/gas will give yellow colour in a filament lamp?

Description : Which of the following vapour/gas will give yellow colour in a filament lamp?   (a) Helium (b) Mercury (c) Magnesium (d) Sodium

Last Answer : Sodium

Explain with neat circuit diagram, low pressure mercury vapour lamp.

Description : Explain with neat circuit diagram, low pressure mercury vapour lamp.

Last Answer : Diagram of low pressure mercury vapour lamp:  Working:-  Whenever 1-ph, 230V, AC Supply is provided to the discharge tube of MVL initially to current will flow from Phase to the ... Capacitor: The function of power factor improvement capacitor is to improve the power factor 0.5 to 0.95 

Describe the construction of high pressure mercury vapour lamp with neat sketch

Description :  Describe the construction of high pressure mercury vapour lamp with neat sketch

Last Answer : Construction:-  It consists of an inner bulb generally of silicon, to withstand high temperatures. The bulb contains a small quantity of mercury and argon. It is protected by outer glass, this ... : The function of power factor improvement capacitor is to improve the power factor 0.5 to 0.95

The number of photons emitted in 10 hours by a 60 W sodium lamp `(lambda` of photon `= 6000 Å)`

Description : The number of photons emitted in 10 hours by a 60 W sodium lamp `(lambda` of photon `= 6000 Å)`

Last Answer : The number of photons emitted in 10 hours by a 60 W sodium lamp `(lambda` of photon `= 6000 Å)` A. `6. ... C. `8.40xx10^(23)` D. `3.40xx10^(23)`

A common fluorescent tube contains (a) sodium vapour (b) argon at low pressure (c) mercury vapour at low pressure (d) mercuric oxide and neon

Description : A common fluorescent tube contains (a) sodium vapour (b) argon at low pressure (c) mercury vapour at low pressure (d) mercuric oxide and neon

Last Answer : Ans:(c)

The most commonly used substances in fluorescent tubes are (a) sodium oxide and argon (b) sodium vapour and neon (c) mercury vapour and argon (d) mercuric oxide and neon

Description : The most commonly used substances in fluorescent tubes are (a) sodium oxide and argon (b) sodium vapour and neon (c) mercury vapour and argon (d) mercuric oxide and neon

Last Answer : Ans:(c)

Sodium vapour lamps glow with yellow colour. This is due to - (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Description : Sodium vapour lamps glow with yellow colour. This is due to - (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Last Answer : (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum Explanation: Sodium Vapour Lamps glow with yellow colour due to the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum.

What is the most commonly used substance in fluorescent tubes? (1) Sodium oxide and argon (2) Sodium vapour and neon (3) Mercury vapour and argon (4) Mercury oxide and neon

Description : What is the most commonly used substance in fluorescent tubes? (1) Sodium oxide and argon (2) Sodium vapour and neon (3) Mercury vapour and argon (4) Mercury oxide and neon

Last Answer : (3) Mercury vapour and argon Explanation: A fluorescent lamp or fluorescent tube is a gas-discharge lamp that uses electricity to excite mercury vapour. it contains mercury vapour and ... A fluorescent lamp converts electrical power into useful light more efficiently than an incandescent lamp.

Sodium vapour lamps glow with yellow colour. This is due to (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Description : Sodium vapour lamps glow with yellow colour. This is due to (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Last Answer : the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum

What is the most commonly used substance in fluorescent tubes? (1) Sodium oxide and argon (2) Sodium vapour and neon (3) Mercury vapour and argon (4) Mercury oxide and neon

Description : What is the most commonly used substance in fluorescent tubes? (1) Sodium oxide and argon (2) Sodium vapour and neon (3) Mercury vapour and argon (4) Mercury oxide and neon

Last Answer : Mercury vapour and argon

What is the name of the gas that burns in a carbide gas lamp ?

Description : What is the name of the gas that burns in a carbide gas lamp ?

Last Answer : The gas that burns in a carbide gas lamp is called acetylene ( C2H2) .

Matrix Matching. `{:("List-I","List-II"),((A) "Gas Thermometers",(p) He),((B) "Beacon lamp", (q) Ne),((C ) "Electric bulbs",(r ) Xe),((D) "Flash bulb"

Description : Matrix Matching. `{:("List-I","List-II"),((A) "Gas Thermometers",(p) He),((B) "Beacon lamp", (q) Ne),((C ) "Electric bulbs",(r ) Xe),((D) "Flash bulb"

Last Answer : Matrix Matching. `{:("List-I","List-II"),((A) "Gas Thermometers",(p) He),((B) "Beacon lamp", (q) Ne),((C ... ",(r ) Xe),((D) "Flash bulb", (s) Kr):}`

A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of A. Carbondioxide gas B. Hydrogen sulphide gas C. Methane gas D. Petrol vapours

Description : A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of A. Carbondioxide gas B. Hydrogen sulphide gas C. Methane gas D. Petrol vapours

Last Answer : ANS: C

Application one lamp controlled from two places

Description : Application one lamp controlled from two places

Last Answer : Application one lamp controlled from two places: 1. For Stair case wiring 2. Hospital Wiring ( For operating the lamp in room and nursing station) 3. Bedroom Lighting. 

A lamp of 100W at 200V is supplied current at 100 volts. It will be equivalent to the lamp of:

Description : A lamp of 100W at 200V is supplied current at 100 volts. It will be equivalent to the lamp of:   a. 50W b. 40W c. 25W d. 10W 

Last Answer : A lamp of 100W at 200V is supplied current at 100 volts. It will be equivalent to the lamp of: 25W

The Lamp resistance of a mini-torch light, operating on 1.5 volts is classified as _____________resistance.

Description : The Lamp resistance of a mini-torch light, operating on 1.5 volts is classified as _____________resistance. A. Low B. Medium C. High D. None of these 

Last Answer : The Lamp resistance of a mini-torch light, operating on 1.5 volts is classified as Medium resistance.

Three lamps are connected in parallel across a 120 Volt source. If one lamp burns out, the remaining two will ...

Description : Three lamps are connected in parallel across a 120 Volt source. If one lamp burns out, the remaining two will be: A. Glow dimmer B. Glow brighter C. Not light D. Glow with the same brightness as before

Last Answer : Glow with the same brightness as before 

The hot resistance of a tungsten lamp is about 10 times the cold resistance. Accordingly, ...

Description : The hot resistance of a tungsten lamp is about 10 times the cold resistance. Accordingly, cold resistance of a 100 W, 200 V lamp will be

Last Answer : The hot resistance of a tungsten lamp is about 10 times the cold resistance. Accordingly, cold resistance of a 100 W, 200 V lamp will be 40 ohm.

The resistance of a 100 W, 200 V lamp is

Last Answer : The resistance of a 100 W, 200 V lamp is 400 ohm.

The ratio of the resistance of a 100 W, 220 V lamp to that of a 100 W, 110 V lamp will be nearly

Last Answer : The ratio of the resistance of a 100 W, 220 V lamp to that of a 100 W, 110 V lamp will be nearly 4.

The resistance of a 230 V, 100 W lamp is

Last Answer : The resistance of a 230 V, 100 W lamp is 529 Ω.

At NTP , 5.6 L of a gas weight 8 g . The vapour density of gas is :-

Description : At NTP , 5.6 L of a gas weight 8 g . The vapour density of gas is :-

Last Answer : At NTP , 5.6 L of a gas weight 8 g . The vapour density of gas is :- A. 32 B. 40 C. 16 D. 8

Vapour density of a gas is 22. What is its molecular mass ?

Description : Vapour density of a gas is 22. What is its molecular mass ?

Last Answer : Vapour density of a gas is 22. What is its molecular mass ? A. 33 B. 22 C. 44 D. 11

Which of the following can not evolve more than one gas (vapour) if heated in dry test tube.

Description : Which of the following can not evolve more than one gas (vapour) if heated in dry test tube.

Last Answer : Which of the following can not evolve more than one gas (vapour) if heated in dry test tube. A. `naNO_(3)(s)` B. ... D. `(NH_(4))_(2)Cr_(2)O_(7)(s)`

Critical pressure of a liquid is the pressure (a) above which liquid will remain liquid (b) above which liquid becomes gas (c) above which liquid becomes vapour (d) above which liquid becomes solid

Description : Critical pressure of a liquid is the pressure (a) above which liquid will remain liquid (b) above which liquid becomes gas (c) above which liquid becomes vapour (d) above which liquid becomes solid

Last Answer : Ans: a

The molecular mass of a gas is – (1) twice its vapour pressure (2) equal to its vapour pressure (3) half its vapour pressure (4) not related to its vapour pressure

Description : The molecular mass of a gas is – (1) twice its vapour pressure (2) equal to its vapour pressure (3) half its vapour pressure (4) not related to its vapour pressure

Last Answer : (1) twice its vapour pressure Explanation: The molecular weight (molar mass) of any gas is the mass of one particle of that gas multiplied by Avogadro's number. It is twice its vapor pressure since ... mass of any gas is twice its density in relation to hydrogen which has 2 atoms in one molecule.

Which of the following is not a greenhouse gas? (1) Water vapour (2) O2 (3) O3 (4) CO2

Description : Which of the following is not a greenhouse gas? (1) Water vapour (2) O2 (3) O3 (4) CO2

Last Answer : (2) O2 Explanation: Greenhouse gases are those that can absorb and emit infrared radiation, but not radiation in or near the visible spectrum. The most abundant greenhouse gases in Earth's atmosphere are: Water ... , Carbon dioxide (CO2), Methane (CH4), Nitrous oxide (N2O), Ozone (O3) and CFCs.

The fourth state of matter is known as (1) Gas (2) Vapour (3) Plasma (4) Electrons

Description : The fourth state of matter is known as (1) Gas (2) Vapour (3) Plasma (4) Electrons

Last Answer : (3) Plasma Explanation: The characteristics of plasmas are significantly different from those of ordinary neutral gases so that plasmas are considered a distinct "fourth state of matter, plasma is a ... it into a plasma, which contains charged particles: positive ions and negative electrons or ions.

A gas is found to have the formula (CO)n. Its vapour density is 70. What must the value of n be?

Description : A gas is found to have the formula (CO)n. Its vapour density is 70. What must the value of n be?

Last Answer : 5

Differentiate between any five of the following: a) DNA and RNA b) Alloy and Amalgam c) Blood and Lymph d) Stars and Planets e) Gas and Vapour f) Brass and Bronze

Description : Differentiate between any five of the following: a) DNA and RNA b) Alloy and Amalgam c) Blood and Lymph d) Stars and Planets e) Gas and Vapour f) Brass and Bronze

Last Answer : a) DNA & RNA RNA: It is single stranded molecule Contains Ribose sugar contains adanine, guanine ,cytosine, & uracil bases generally located in cytoplasm is of three kinds DNA: Double stranded deoxyribose contains ... and Bronze: Brass: an alloy of copper and zinc Bronze: an alloy of copper and tin

Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the (A) Latent heat (B) Humid heat (C) Specific heat (D) Sensible heat

Description : Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the (A) Latent heat (B) Humid heat (C) Specific heat (D) Sensible heat

Last Answer : (C) Specific heat

In saturated gas, the (A) Vapour is in equilibrium with the liquid at the gas temperature (B) Vapour is in equilibrium with the liquid at the room temperature (C) Partial pressure of vapour equals the vapour pressure of the liquid at room temperature (D) None of these

Description : In saturated gas, the (A) Vapour is in equilibrium with the liquid at the gas temperature (B) Vapour is in equilibrium with the liquid at the room temperature (C) Partial pressure of vapour equals the vapour pressure of the liquid at room temperature (D) None of these

Last Answer : (A) Vapour is in equilibrium with the liquid at the gas temperature

Dew point of a gas-vapour mixture (A) Increases with temperature rise (B) Decreases with temperature rise (C) Decreases with decrease in pressure (D) Increases with increase in pressure

Description : Dew point of a gas-vapour mixture (A) Increases with temperature rise (B) Decreases with temperature rise (C) Decreases with decrease in pressure (D) Increases with increase in pressure

Last Answer : (C) Decreases with decrease in pressure

Relative humidity is the ratio of the (A) Partial pressure of the vapour to the vapour pressure of the liquid at room temperature (B) Partial pressure of the vapour to the vapour pressure of the liquid at gas temperature (C) Actual humidity to saturation humidity (D) None of these

Description : Relative humidity is the ratio of the (A) Partial pressure of the vapour to the vapour pressure of the liquid at room temperature (B) Partial pressure of the vapour to the vapour pressure of the liquid at gas temperature (C) Actual humidity to saturation humidity (D) None of these

Last Answer : (B) Partial pressure of the vapour to the vapour pressure of the liquid at gas temperatur

The temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the __________ temperature. (A) Dew point (B) Wet bulb (C) Dry bulb (D) None of these

Description : The temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the __________ temperature. (A) Dew point (B) Wet bulb (C) Dry bulb (D) None of these

Last Answer : (D) None of these

The adiabatic saturation curve for a vapour-gas mixture is (A) Straight line (B) Slightly concave upward (C) Slightly concave downward (D) None of these

Description : The adiabatic saturation curve for a vapour-gas mixture is (A) Straight line (B) Slightly concave upward (C) Slightly concave downward (D) None of these

Last Answer : (B) Slightly concave upward

Condensation of a vapour-gas mixture just begins, when (where, p = partial pressure of the vapour P = vapour pressure of the liquid). (A) p = P (B) p >>P (C) p < P (D) p << P

Description : Condensation of a vapour-gas mixture just begins, when (where, p = partial pressure of the vapour P = vapour pressure of the liquid). (A) p = P (B) p >>P (C) p < P (D) p

Last Answer : (A) p = P

Humid volume is the total volume in m3 of 1 kg of (A) Vapour laden gas at 1 atm. and room temperature (B) Gas plus its accompanying vapour at 1 atm. and room temperature (C) Gas plus its accompanying vapour at 1 atm. and gas temperature (D) Vapour laden gas at 1 atm. and gas temperature

Description : Humid volume is the total volume in m3 of 1 kg of (A) Vapour laden gas at 1 atm. and room temperature (B) Gas plus its accompanying vapour at 1 atm. and room temperature (C) Gas plus its accompanying vapour at 1 atm. and gas temperature (D) Vapour laden gas at 1 atm. and gas temperature

Last Answer : (C) Gas plus its accompanying vapour at 1 atm. and gas temperature

The relative saturation of a partially saturated mixture of vapour and gas can be increased by __________ of the mixture. (A) Reducing the total pressure (B) Increasing the total pressure (C) Reducing the temperature (D) Both (B) and (C)

Description : The relative saturation of a partially saturated mixture of vapour and gas can be increased by __________ of the mixture. (A) Reducing the total pressure (B) Increasing the total pressure (C) Reducing the temperature (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is __________ percent. (A) 100 (B) 0 (C) 50 (D) Between 0 and 100

Description : At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is __________ percent. (A) 100 (B) 0 (C) 50 (D) Between 0 and 100

Last Answer : (B) 0

Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the __________ temperature. (A) Dry-bulb (B) Wet-bulb (C) Dew point (D) Adiabatic saturation

Description : Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the __________ temperature. (A) Dry-bulb (B) Wet-bulb (C) Dew point (D) Adiabatic saturation

Last Answer : (B) Wet-bulb

The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C. (A) 25 (B) > 25 (C) < 25 (D) - 25

Description : The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C. (A) 25 (B) > 25 (C) < 25 (D) - 25

Last Answer : (B) > 25

Presence of a non-condensing gas in a condensing vapour (A) Increases the rate of condensation (B) Decreases thermal resistance (C) Is desirable to increase the film co-efficient (D) None of these

Description : Presence of a non-condensing gas in a condensing vapour (A) Increases the rate of condensation (B) Decreases thermal resistance (C) Is desirable to increase the film co-efficient (D) None of these

Last Answer : (D) None of these

Use of excess of combustion air in the combustion of fuels results in (A) Heat losses (B) Long flame (C) Condensation of water vapour from the fuel gas (D) None of these

Description : Use of excess of combustion air in the combustion of fuels results in (A) Heat losses (B) Long flame (C) Condensation of water vapour from the fuel gas (D) None of these

Last Answer : (A) Heat losses

In an ammonia plant, the purge off is essential to (A) Maintain inert gas concentration within a limit (B) Remove excess poisonous gases (C) Maintain H2 : N2 ratio at 3 :1 (D) Remove uncondensed ammonia vapour

Description : In an ammonia plant, the purge off is essential to (A) Maintain inert gas concentration within a limit (B) Remove excess poisonous gases (C) Maintain H2 : N2 ratio at 3 :1 (D) Remove uncondensed ammonia vapour

Last Answer : (C) Maintain H2 : N2 ratio at 3 :1

Any substance above its critical temperature exists as (A) Saturated vapour (B) Solid (C) Gas (D) Liquid

Description : Any substance above its critical temperature exists as (A) Saturated vapour (B) Solid (C) Gas (D) Liquid

Last Answer : (C) Gas

Clausius-Clapeyron Equation gives accurate result, when the (A) Vapour pressure is relatively low and the temperature does not vary over wide limits (B) Vapour obeys the ideal gas law and the latent heat of vaporisation is constant (C) Volume in the liquid state is negligible compared with that in the vapour state (D) All (A), (B) and (C)

Description : Clausius-Clapeyron Equation gives accurate result, when the (A) Vapour pressure is relatively low and the temperature does not vary over wide limits (B) Vapour obeys the ideal gas law and the latent heat of ... is negligible compared with that in the vapour state (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

To obtain integrated form of Clausius-Clapeyron equation, ln (P2/P1) = (∆HV/R) (1/T1- 1/T2) from the exact Clapeyron equation, it is assumed that the (A) Volume of the liquid phase is negligible compared to that of vapour phase (B) Vapour phase behaves as an ideal gas (C) Heat of vaporisation is independent of temperature (D) All (A), (B) & (C)

Description : To obtain integrated form of Clausius-Clapeyron equation, ln (P2/P1) = (∆HV/R) (1/T1- 1/T2) from the exact Clapeyron equation, it is assumed that the (A) Volume of the liquid phase is negligible compared to ... gas (C) Heat of vaporisation is independent of temperature (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)