Description : Assertion : In a radioactive disintegration, an electron is emitted by the nucleus. Reason : Electrons are always present inside the nucleus.
Last Answer : Assertion : In a radioactive disintegration, an electron is emitted by the nucleus. Reason : Electrons are ... both (A) and (R ) are incorrect.
Description : Assertion (A) : Dope test is used to estimate the lavel of blood alcohol by analyzing the breath of persons drinking alcohol. Reason (R) : A drunken p
Last Answer : Assertion (A) : Dope test is used to estimate the lavel of blood alcohol by analyzing the breath of ... D. If both the assertion and reason are false
Description : In the Compton effect, a photon of wavelength l (read: lambdw) collides with a stationary electron. The wavelength of the emitted photon is: w) longer than l x) shorter than l y) the same as l z) no photon is emitted
Last Answer : ANSWER: W -- LONGER THAN l
Description : Assertion : Rainbow is an example of the dispersion of sunlight by the water droplets. Reason: light of shorter wavelength is scattered much more than light of longer wavelength (a) Both A and R are true and R is the correct ... of A.(c) A is true but R is false. (d) A is false but R is true.
Last Answer : (c) A is true but R is false.
Description : Assertion (A) :Sunlight reaches us without dispersion in the form of white light and not as a component. Reason(R) : Dispersion takes place due to variation of refractive index for different wavelength but in vaccum the speed of ... of A. (c) A is true but R is false. (d) A is false but R is true.
Last Answer : (a) Both A and R are true and R is the correct explanation of A.
Description : This life cycle model is basically driven by schedule and budget risks This statement is best suited for A. Water fall model B. Spiral model C. Incremental model D. V-Model Q33. The bug tracking ... these phases for each bug. I. Phase injected II. Phase detected III. Phase fixed IV. Phase removed
Last Answer : B. I, II and IV
Description : Assertion: Phenol is more reactive than benzene towards electrophilic reactions. Reason : The +R effect of OH group increases the electron density on
Last Answer : Assertion: Phenol is more reactive than benzene towards electrophilic reactions. Reason : The +R effect of ... D. A is incorrect but R is correct
Description : Hydrogen atom electron is excited to n = 4 state , in the spectrum of emitted radiation , number of lines in the ultravoilet and visible regions are r
Last Answer : Hydrogen atom electron is excited to n = 4 state , in the spectrum of emitted radiation , number of lines in the ... 1 , 3 C. 2 , 3 D. 3 , 2
Description : The X-rays emitted in inner shell transitions are called _____ as their energy depends upon the type of target material. a) gamma rays b) special X-rays c) Characteristic X-rays d) continuous X-rays
Last Answer : c) Characteristic X-rays
Description : By the transition of inner shell electrons in heavy atoms, high energy photons are emitted which are a) gamma rays b) X-rays c) radio waves d) photon rays
Last Answer : b) X-rays
Description : Assertion (A) : The value of k for which the system of linear equations kx+2y+1=0 and 6x+4y-5=0 has a unique solution is 3. Reason (R):The system of linear equations a1x + b1y + c1= 0 and a2x + ... not the correct explanation of A. (c) A is correct; R is incorrect. (d) R is correct; A is incorrect.
Last Answer : (d) R is correct; A is incorrect.
Description : What is the wavelength of red light emitted by a helium-neon laser? w) 122 nanometers x) 633 nanometers y) 2.43 picometers z) 1.37 micrometers
Last Answer : ANSWER: X -- 633 NANOMETERS (actually 632.8 nm)
Description : To develop the correct mathematical description of the distribution of radiated energy of a blackbody with respect to wavelength for a given temperature, Planck found it necessary to assume that the molecular ... units or quanta y) radiant energy in a continuous form z) none of the above.
Last Answer : ANSWER: X -- RADIANT ENERGY IN DISCRETE UNITS OR QUANTA
Description : Glass transition temperature is detected through (A) X-Ray diffractometery (B) Solution calorimetery (C) Differential scanning calorimetery (D) Thermogravimetric analysis
Last Answer : (C) Differential scanning calorimetery
Description : Why radiologists do not take direct X-ray photographs of intestine ? (1) Intestines are affected by direct exposure to X-rays (2) X-rays can not cross intestine (3) X-rays are not able to capture clear picture (4) Even short exposure of X-rays causes cancer in intestine
Last Answer : X-rays are not able to capture clear picture
Description : Electro magnetic radiation is emitted by (a) X-ray (b) Electrons (c) Ultrasonic (d) Protons
Last Answer : Ans:(b)
Description : The atomic number of a nucleus will increase by 1 if which of the following is emitted by the nucleus? w) an alpha particle x) a positron y) a beta particle z) a gamma ray
Last Answer : ANSWER: Y -- BETA PARTICLE
Description : Assertion: Biomagnification of DDT can enhance the decline in bird population. Reason: DDT causes thinning of egg shell and their premature breaking b
Last Answer : Assertion: Biomagnification of DDT can enhance the decline in bird population. Reason: DDT causes thinning of ... and Reason are false, then mark (4).
Description : Whenever a photon is emitted by hydrogen in balmer series it is followed by another in lyman series what wavelength does this latter photon correspond
Last Answer : Whenever a photon is emitted by hydrogen in balmer series it is followed by another in ... what wavelength does this latter photon correspond to?
Description : When the wavelength of a spectral line emitted from an object decreases which end of the visible light spectrum does it move toward and what is the object and motion relative to Earth?
Last Answer : Need answer
Description : Which radiation emitted from the sun has highest wavelength?
Last Answer : Micro waves
Description : Pick out the wrong statement pertaining to 'green house' for the plants. (A) 'Green house' (made of glass) allows visible sunlight (i.e., short wavelength solar radiation like ultra-violet rays) ... ' thereby warming up the earth's surface (D) 'Green house' is colder than the outside atmosphere
Last Answer : (D) 'Green house' is colder than the outside atmosphere
Description : Wavelength of radiation emitted by a body depends on the __________ of its surface. (A) Temperature (B) Area (C) Nature (D) All 'a', 'b' & 'c'
Last Answer : Option
Description : Which radiation emitted from the sun has highest wavelength
Last Answer : Microwaves
Description : Light rays that are emitted simultaneously from an LED and propagated down an optical fiber do not arrive at the far end of the fiber at the same time results to ∙ A. intramodal dispersion ∙ B. pulse length dispersion ∙ C. modal dispersion ∙ D. wavelength dispersion
Last Answer : D. wavelength dispersion
Description : What is the typical wavelength of light emitted from epitaxially grown LEDs? ∙ a. 840 nm ∙ b. 490 nm ∙ c. 480 nm ∙ d. 940 nm
Last Answer : ∙ d. 940 nm
Description : 1. Which radiation emitted from the sun has highest wavelength? 2. What is a person of mixed European and Indian blood in Latin America is called? 3. The first Buddhist Council was held in which ... how many k.m.? 20. Rajiv Gandhi National Flying Institute is has been established in which State?
Last Answer : Answer : 1. Micro waves 2. Mestizo 3. Rajgriha 4. June 5 5. Billiards 6. Calcium oxalate 7. South and Little Andaman 8. Aurangzeb 9. Constitution of India 10. Zinc oxide 11. 1924-25 12. Mt. ... . Due to Nuclear pollution 16. Chief Minister 17. Moong and Urad 18. Brahmanas 19. 50 km 20. Maharashtra
Description : What is the harmful ray emitted from color television ?
Last Answer : The harmful rays emitted from color television are called gamma rays.
Description : What ray is emitted from cobalt _60 ?
Last Answer : Gamma rays are emitted.
Description : From which part of the atom of the radioactive element is the radioactive ray emitted ?
Last Answer : The radioactive ray is emitted from the nucleus of the atom of the radioactive element.
Description : Decrease in atomic number is observed during a)`alpha`-emission b)`beta`-emission c)positron emission d)electron capture
Last Answer : Decrease in atomic number is observed during a)`alpha`-emission b)`beta`-emission c)positron emission ... `-emission C. positron emission D. K-capture
Description : The decrease in the atomic number is not observed in case of (A) Electron capture (B) β-emission (C) α-emission (D) Positron emission
Last Answer : (B) β-emission
Description : Assertion :- First electrons affinity fo all element is positive. Reason :- Successive electron affinity of all elements is negative
Last Answer : Assertion :- First electrons affinity fo all element is positive. Reason :- Successive electron affinity ... D. If both Assertion & Reason are false
Description : Assertion :- In a redox reaction, the oxidation number of the oxidant decreases while that of reductant increases. Reason :- Oxidant gains electron(s)
Last Answer : Assertion :- In a redox reaction, the oxidation number of the oxidant decreases while that of reductant ... D. If both Assertion & Reason are False.
Description : Assertion :- A reducing agent is a substance which accepts electron. Reason :- A substanc which helps in oxidaton is known as reducing agent.
Last Answer : Assertion :- A reducing agent is a substance which accepts electron. Reason :- A substanc which helps ... . D. If both Assertion & Reason are False.
Description : Assertion A beam of electron can pass undeflected through a region of E and B. Reason Force on moving charged particle due to magnetic field may be ze
Last Answer : Assertion A beam of electron can pass undeflected through a region of E and B. Reason Force on ... to magnetic field may be zero in some cases.
Description : When the electron of a hydrogen atom jumps from the n=4 to the n=1 state , the number of all pos - sible spectral lines emitted is :-
Last Answer : When the electron of a hydrogen atom jumps from the n=4 to the n=1 state , the number of all pos - sible spectral ... is :- A. 15 B. 6 C. 3 D. 4
Description : An electron in an excited hydrogen atom acquired an energy of 12.1 eV. To what energy level did it jump? How many spectral lines may be emitted in the
Last Answer : An electron in an excited hydrogen atom acquired an energy of 12.1 eV. To what ... to lower energy level? Calculate the corresponding wavelengths.
Description : Electron are emitted from an electron gun at almost zero velocity and are accelerated by an electric field `E` through a distance of `1.0m` The electr
Last Answer : Electron are emitted from an electron gun at almost zero velocity and are accelerated by an electric field ... .5 nm` may be emitted by the hydrogen?
Description : The electron emitted in beta radiation originates from where?
Last Answer : nner orbits of atoms
Description : The _____ is equal to the number of electrons emitted per second times the electron charge ∙ a. Intensity ∙ b. Optical power ∙ c. Photocurrent ∙ d. Responsitivity
Last Answer : c. Photocurrent
Description : 1. In which years did the Right to Information Act come into force? 2. The electron emitted in beta radiation originates from where? 3. The name of Geoff Bycott is associated with which game? ... of the day during summer? 20. Which Mughal emperor is credited with the composition of Hindi songs?
Last Answer : Answer : 1 1. 2005 2. Inner orbits of atoms 3. Cricket 4. 23 hrs 56 minutes 4.09 see 5. Tejapala 6. D. W. Eisenhower 7. Inner part of ear 8. V.V. Giri 9. Argon 10. Amir Khusrau 11. R ... low pressure 15. Tomb of Sikandar Lodi 16. 38 ATP 17. In the Supreme Court 18. Cathode 19. Norway 20. Jahangir
Description : What is the wavelength of X ray ?
Last Answer : X-ray wavelength is about 10-8 cm or 1 angstrom.
Description : The X –ray beam coming from an X-ray tube will be (a) Monochromatic (b) Having all wavelengths larger than a certain minimum wavelength (c) Having all wavelengths smaller than a certain maximum wavelength (d) Having all wavelengths between a minimum and a maximum wavelength
Description : In the X-ray radiography technique, the tube voltage for thicker plates as compared to thin plates, should be (A) Higher, as it gives higher wavelength (B) Lower, as it gives higher wavelength (C) Higher, as it gives shorter wavelength (D) Lower, as it gives shorter wavelength
Last Answer : (C) Higher, as it gives shorter wavelength
Description : A characteristic of the noble gases is that they all: w) have eight electrons in the outer shell x) have low stability y) form many compounds z) have filled outer electron shells
Last Answer : ANSWER: Z -- HAVE FILLED OUTER ELECTRON SHELLS
Description : The total energy of electron in the Bohr orbit is given by the formula, E = a) - ke2 /2r b) - ke2 /2r2 c) - k 2 e/2r d) - ke2 /r
Last Answer : a) - ke2 /2r
Description : The need to produce concentrated urine is detected in the brain is due to the increase in the concentration of (a) Glucose in the blood (b) K+ in the blood (c) Na+ in the blood (d) Carbonic acid in the blood
Last Answer : Ans:(c)
Description : A wavelength is commonly measured in which one of the following units? w) radians x) angstroms y) electron volts z) seconds
Last Answer : ANSWER: X -- ANGSTROMS
Description : Assertion : Small cells are metabolically less active Reason : K.I. of small cells is less.
Last Answer : Assertion : Small cells are metabolically less active Reason : K.I. of small cells is less. A. If ... False. D. If both Assertion & Reason are false.