Description : Assertion : Reduction of ZnO with carbon is done at `1100^(@)C`. Reason : At this temperature, `DeltaG^(@)` is negative and the process is spontaneous
Last Answer : Assertion : Reduction of ZnO with carbon is done at `1100^(@)C`. Reason : At this temperature, ... ^(@)` is negative and the process is spontaneous.
Description : In Belgan process, for reduction of ZnO to Zn reductant is
Last Answer : In Belgan process, for reduction of ZnO to Zn reductant is A. Water gas B. Coal or Coke C. Al D. `H_(2)`
Description : Go through the following graph and answer the following questions. Which of the following reaction is true?
Last Answer : Go through the following graph and answer the following questions. Which of the following reaction is true? ... coke after 500-600K. D. All of these
Description : Go through the following graph and answer the following questions. At what approximate temperature, zinc and carbon have equal affinity for oxygen.
Last Answer : Go through the following graph and answer the following questions. At what approximate temperature, zinc and carbon have ... 500^(@)C` D. `1200^(@)C`
Description : What temprature does paint dry?
Last Answer : What is the answer ?
Description : To preserve the filaments at high temprature, which gas is filled in the electric bulbs?
Last Answer : Argon.
Description : The boiling point of water decreases at higher altitudes is due to (1) low temperature (2) low atmospheric pressure (3) high temprature (4) high atmospheric pressure
Last Answer : low atmospheric pressure
Description : Spontaneous blast reduction after leukemia diagnosis: Is it possible for the blast percentage in the body to decrease after being diagnosed with cancer without any chemotherapy? And if so, what does this mean?
Last Answer : Is this AML or ALL?
Description : Which of the following reaction is spontaneous oxidation - reduction reaction
Last Answer : Which of the following reaction is spontaneous oxidation - reduction reaction A. `Mn^(+2)+5Fe^(+3)+4H_(2) ... OrarrMnO_(4)^(-)+5Fe^(+3)+8H^(+)`
Description : The working of a dry cell is based on - (1) Decomposition reaction (2) Spontaneous oxidation-reduction reaction (3) Combination reaction. (4) Electrolysis
Last Answer : (4) Electrolysis Explanation: A dry cell is a type of battery that uses a paste electrolyte, with only enough moisture to allow current to flow. It works in accordance with Faraday's law of ... of the cell (the positive electrode), and the space between them is filled with an electrolyte paste.
Description : The working of a dry cell is based on (1) Decomposition reaction (2) Spontaneous oxidation-reduction reaction (3) Combination reaction (4) Electrolysis
Last Answer : Electrolysis
Description : Study the graph given below and answer the following questions: -SST 10th
Last Answer : (i) Primary Sector (ii) Tertiary Sector (iii) Tertiary Sector (iv) Rs. 2,100,00 crore
Description : On the basis of reading of the graph, answer the following questions: -SST 10th
Last Answer : (i) In the 1950s, India and China produced almost the same quantity of steel. (ii) Today, China has become the largest producer of steel. (iii) In the year 2004, India was the largest exporter of steel.
Description : What are amphoteric oxides? Choose the amphoteric oxides from amongst the following oxides: Na2O, ZnO, Al2O3, CO2, H2O -Chemistry
Last Answer : Those oxides which reacts with acids as well as bases to produce salts and water are called amphoteric oxides, e.g. Na2O, ZnO, are amphoteric oxides among given oxides.
Description : What is the trade name of ZnO ?
Last Answer : ZnO 's trade name is Ginsite.
Description : Givecn that : `Zn+1//2O_(2)rarr ZnO+84000` cal ……………1 `Hg+1//2O_(2)rarr HgO+21700` cal …………2 The heat of reaction `(Delta H)` for, `Zn+HgO rarr ZnO+Hg
Last Answer : Givecn that : `Zn+1//2O_(2)rarr ZnO+84000` cal 1 `Hg+1//2O_(2)rarr HgO+21700` cal 2 ... cal B. 62300 cal C. `-105700` cal D. `-62300` cal
Description : Which of the following is produced during the following reaction ? `CO(g)+H_(2)overset(575K)underset(ZnO,Cr_(2)O_(3))rarr` ……?
Last Answer : Which of the following is produced during the following reaction ? `CO(g)+H_(2)overset(575K)underset(ZnO,Cr_(2)O_ ... 3)COOH` C. `HCOOH` D. `CH_(3)OH`
Description : Extraction of Zn is based on the following thermodynamic reaction. (A)` 2ZnS + 3O_(2) to 2ZnO+ 2SO_(2)` (B) `ZnO + C to Zn + CO" " DeltaG_(f)^(0)` are
Last Answer : Extraction of Zn is based on the following thermodynamic reaction. (A)` 2ZnS + 3O_(2) to 2ZnO+ 2SO_(2)` (B) ... (5) J//"mol"` The value of X a will be
Description : In the following reaction: `ZnS+O_(2)overset(Delta)rarrA+ZnO` `4HCl+O_(2)overset(CuCl_(2))rarrB+2H_(2)O` `A+B overset(hv)rarrC` Then A, B and C are:
Last Answer : In the following reaction: `ZnS+O_(2)overset(Delta)rarrA+ZnO` `4HCl+O_(2)overset(CuCl_(2))rarrB+2H_(2)O` ` ... SOCl_(2)` D. `SO_(3),HClO_(3),HClO_(4)`
Description : Plants take zinc in the form of (a) ZnSO4 (b) Zn++ (c) ZnO (d) Zn.
Last Answer : (b) Zn++
Description : __________ is used as a catalyst in fat splitting. (A) ZnO (B) Ni (C) V2O5 (D) FeO
Last Answer : (A) ZnO
Description : Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture. (A) CaO (B) MnO2 (C) ZnO (D) FeS
Last Answer : (C) ZnO
Description : Consider the production of ammonia from methene and air as raw materials. The catalysts used are: (i) __________ for steam reforming of methane and (ii) __________ for ammonia synthesis. (A) (i) - Ni/Al2O3 ; (ii) - Cu - ZnO/ ... (i) - Ni/Al2O3 ; (ii) - Fe/Al2O3 (D) (i) - Fe/Al2O3 ; (ii) - Ni/Al2O3
Last Answer : (C) (i) - Ni/Al2O3 ; (ii) - Fe/Al2O3
Description : Fat splitting catalyst is (A) CaCO3 (B) ZnO (C) Al2O3 (D) Fe
Last Answer : (B) ZnO
Description : The theory of spontaneous generation of life was experimentally disproved by: 1. Francesco Redi 2. Lamark 3. Leeuwenhock 4. Louis Pasteur Select the correct answer using the codes given below: (a) Only 1 (b) 2 and 3 (c) 1 and 4 (d) Only 4
Last Answer : Ans:(c)
Description : In a spontaneous irreversible process the total entropy of the system and surroundings
Last Answer : In a spontaneous irreversible process the total entropy of the system and surroundings A. Remains constant B. Increases C. Decreases D. Zero
Description : Identify the correct statement regarding a spontaneous process:
Last Answer : Identify the correct statement regarding a spontaneous process: A. For a spontaneous process in ... process is the only criterion for spontaneity
Description : For a spontaneous process the correct statement is -
Last Answer : For a spontaneous process the correct statement is - A. Entropy of the system always increase ... negative D. Total entropy change is always positive
Description : What process was studied by Redi and Spaltanzani? a. Spontaneous generation b. Fermentation c. Variolation d. Antisepsis
Last Answer : a. Spontaneous generation
Description : _________ law of thermodynamics ascertains the direction of a particular spontaneous process. (A) Zeroth (B) First (C) Second (D) Third
Last Answer : (C) Second
Description : In any spontaneous process, (A) Only F decreases (B) Only A decreases (C) Both F and A decreases (D) Both F and A increase
Last Answer : (C) Both F and A decreases
Description : In any spontaneous process, the __________ free energy decreases. (A) Helmholtz (B) Gibbs (C) Both ‘a’ & ‘b’ (D) Neither 'a' nor 'b'
Last Answer : (C) Both ‘a’ & ‘b’
Description : Pick out the wrong statement: (A) The expansion of a gas in vacuum is an irreversible process (B) An isometric process is a constant pressure process (C) Entropy change for a reversible adiabatic process is zero (D) Free energy change for a spontaneous process is negative
Last Answer : (B) An isometric process is a constant pressure process
Description : For a spontaneous process, free energy (A) Is zero (B) Increases (C) Decreases whereas the entropy increases (D) And entropy both decrease
Last Answer : C) Decreases whereas the entropy increases
Description : For a spontaneous natural process at constant temperature and pressure, the free energy of the system always (A) Increases (B) Decreases (C) Remain constant (D) Increases to a maximum before decreasing
Last Answer : : Option A
Description : The process of moving from one energy level to another is called ____________. ∙ A. Spontaneous emission ∙ B. Excited emission ∙ C. Absorption ∙ D. Spontaneous decay
Last Answer : C. Absorption
Description : The process of decaying from one energy level to another energy level is called __________. ∙ A. Spontaneous emission ∙ B. Excited emission ∙ C. Absorption ∙ D. Any of these
Last Answer : A. Spontaneous emission
Description : The velocity-time graph shows the motion of a cyclist. Find (i) its acceleration (ii) its velocity (iii) the distance covered by the cyclist in 15 seconds Numerical Questions and answers on Motion for Class 9 physics -Science
Last Answer : (i) We can see from the graph that velocity is not changing So,acceleration is equal to zero. (ii) By Reading the graph, velocity = 20 m/s (iii) Distance covered in 15 seconds, s=u×t=20×15=300s=u×t=20×15=300 m
Description : 10) i) \( A=\{a, b, c\} \) and \( B=\{x, 4\} \). Write \( A \times B \)ii) Graph of the function \( f: R \rightarrow R \) is given below.a) Write the value of \( f(x) \)b) Write the range of \( f(x) \)c) Identify The function and choose the correct answer.
Last Answer : 10) i) \( A=\{a, b, c\} \) and \( B=\{x, 4\} \). Write \( A \times B \) ii) ... of \( f(x) \) c) Identify The function and choose the correct answer.
Description : How would you answer this questionSketch the graph of y = I ax+b I and y = I cx+d ISolve I ax+b I > or equal to I cx+d I?
Last Answer : Answers is the place to go to get the answers you need and to ask the questions you want
Description : What device do you use the most for spontaneous web surfing?
Last Answer : The phone.
Description : If you try to search Spontaneous Cerebro-Spinal Fluid Leak" how do you search it?
Last Answer : Searching on “spontaneous cerebrospinal fluid leak” brought up several valid results for me.
Description : How do you do your Christmas/Chanukah/holiday shopping? Are you a planner and list maker or a spontaneous buyer?
Last Answer : I do not.
Description : Spontaneous Human Combustion: myth or reality?
Last Answer : I think it is a load of crap, this whole spontaneous human co….......WHOOOSHHHHH…... ................
Description : What if everything you thought about Spontaneous Human Combustion was wrong?
Last Answer : Are you proposing this as reality or just asking for fun?
Description : Do you believe in spontaneous generation?
Last Answer : No. Spontaneous generation is something like mosquitos forming from mud, or mice forming from cereal. It is bollocks.
Description : Is there a modern-day case of spontaneous combustion?
Last Answer : Good question…not sure… if there is I couldn’t find one but did find this interesting
Description : Do you think spontaneous combustion can actually happen?
Last Answer : Myth. It’s an urban legend until it can be scientifically quantified.
Description : How spontaneous are you?
Last Answer : I’m very spontaneous. In fact, i always make sure that I have time for some spontaneity in my schedule.
Description : What are your thoughts on spontaneous human combustion ?
Last Answer : i think tha…BOOM!