Description : Assertion (A) : Half life of a radioactive isotope is the time required to decrease its mass number by half Reason (R ) : Half life of radioactive iso
Last Answer : Assertion (A) : Half life of a radioactive isotope is the time required to decrease its mass number by half ... . If both (A) and (R ) are incorrect.
Description : Assertion `(A) :` In radioactive disintegrations, `._(2)He^(4)` nuclei can come out of the nucleus but lighter `._(2)H^(3)` cannot. Reason `(R) :` The
Last Answer : Assertion `(A) :` In radioactive disintegrations, `._(2)He^(4)` nuclei can come out of the nucleus but ... D. If both (A) and (R ) are incorrect.
Description : Assertion `(A):` `._(92)U^(238) (IIIB)overset(-alpha)rarrAoverset(-alpha)rarrB overset(-beta)rarrC` Reason `(R):` Element `B` will be of `II A ` group
Last Answer : Assertion `(A):` `._(92)U^(238) (IIIB)overset(-alpha)rarrAoverset(-alpha)rarrB overset(-beta)rarrC` Reason ... D. If both (A) and (R ) are incorrect.
Description : Assertion `(A): ` The emission of `alpha-` particles results in the formation of isodiapher of parent element. Reason `(R) : ` Isodiaphers have same i
Last Answer : Assertion `(A): ` The emission of `alpha-` particles results in the formation of isodiapher of parent element ... If both (A) and (R ) are incorrect.
Description : Assertion (A): Micelles are formed by surfactant molecules above the critical micellization concentration `(CMC)` . Reason(R): The conductivity of a s
Last Answer : Assertion (A): Micelles are formed by surfactant molecules above the critical micellization concentration ` ... If both Assertion & Reason are False.
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 : The new nucleus formed after β-decay of a radioactive element has (A) Less atomic number (B) Less atomic weight (C) More atomic number (D) More atomic weight
Last Answer : (A) Less atomic number
Description : Assertion (A): Learning is a life long process. Reason (R): Learning to be useful must be linked with life processes. Choose the correct Answer from the following code (A) Both (A) and (R) are true and (R) is the correct ... (C) (A) is true, but (R) is false (D) (A) is false, but (R) is true.
Last Answer : Answer: B
Description : Assertion :- Fossils are always reamins of hard parts of life -forms found only in rocks. Reason :- Rocks are formed due to sediments.
Last Answer : Assertion :- Fossils are always reamins of hard parts of life -forms found only in rocks. Reason :- ... . D. If both Assertion & Reason are false.
Description : Assertion (A) : The concentration of methane in the atmosphere has more than doubled in the last 250 years. Reason (R): Wetlands and rice fields are t
Last Answer : Assertion (A) : The concentration of methane in the atmosphere has more than doubled in the last 250 ... true but reason is wrong D. Both are wrong
Description : Assertion `(A) : beta-` particles are deflected more than `alpha-` particles in a given electric field. Reason `(R) : `Charge on `alpha-` particles is
Last Answer : Assertion `(A) : beta-` particles are deflected more than `alpha-` particles in a given electric field. ... . If both (A) and (R ) are incorrect.
Description : Assertion `(A) :` Hydrogen bomb is more powerful than atomic bomb. Reason `(R) :` In hydrogen bomb, fusion reaction is initiated. a)If both `(A)` and
Last Answer : Assertion `(A) :` Hydrogen bomb is more powerful than atomic bomb. Reason `(R) :` In hydrogen bomb, fusion ... D. If both (A) and (R ) are incorrect.
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 : Assertion (A): Hydrostatic lubrication is more advantageous when compared to hydrodynamic lubrication during starting and stopping the journal in its bearing. Reason (R): In hydrodynamic lubrication, the fluid film pressure is ... (c) A is true but R is false (d) A is false but R is true
Last Answer : (b) Both A and R are individually true but R is not the correct explanation of A
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: Depth and width required at the entrance to a harbour are more than those required in the channel. Reason R: The entrance to a harbour is usually more exposed to waves as compared to the harbour itself. ... explanation 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 is true and R is the correct explanation of A
Description : Assertion A : The load factor for live load is greater than that for dead load. Reason R : The live loads are more uncertain than dead loads. Select your answer based on the coding system given below: (A) Both A ... explanation of A (C) A is true but R is false (D) A is false but R is true
Last Answer : Answer: Option A
Description : Assertion : Secondary air pollutants are formed by interactin among primary pollutants and are more toxic Reason: DDT is secondary air pollutants
Last Answer : Assertion : Secondary air pollutants are formed by interactin among primary pollutants and are more toxic ... but reason is wrong D. Both are wrong
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 : In the first Cauer network, with a pole at infinity, the first element must be
Last Answer : In the first Cauer network, with a pole at infinity, the first element must be Series inductor
Description : Assertion (A) `:` Amphibians have evolved from fishes . Reason (R ) `:` Archaeopteryx is a fossil linking fishes and amphibians `:`
Last Answer : Assertion (A) `:` Amphibians have evolved from fishes . Reason (R ) `:` Archaeopteryx is a ... false D. If both Assertion and Reason are false.
Description : Assertion (A) : Cancer cells are virtually immortal until the body in which they reside dies. Reason`(R)`: Cancer is caused by damage to genes regulat
Last Answer : Assertion (A) : Cancer cells are virtually immortal until the body in which they reside dies. Reason ... D. If both the assertion and reason are false
Description : Assertion (A): Organ transplantation patients are given immunosuppressive durgs. Reason (R): Transplanted tissue has antigens which stimulate the spec
Last Answer : Assertion (A): Organ transplantation patients are given immunosuppressive durgs. Reason (R): ... If both the assertion and reason are false
Description : Assertion (A): A person who has received a cut and is bleeding needs to be given antitetanus treatment. Reason(R): Antitetanus injection provides immu
Last Answer : Assertion (A): A person who has received a cut and is bleeding needs to be given antitetanus ... D. If both the assertion and reason are false
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 : Assertion (A) : Severe Acute Respiratory Syndrome (SARS) originated in China. Reason `(R)`: China is the most populated country of the world.
Last Answer : Assertion (A) : Severe Acute Respiratory Syndrome (SARS) originated in China. Reason `(R)`: China ... D. If both the assertion and reason are false
Description : Assertion (A): Many visitors to the hills suffer from skin and respiratory allergy problems. Reason (R): Conifer trees produce a large quantity of win
Last Answer : Assertion (A): Many visitors to the hills suffer from skin and respiratory allergy problems. Reason ( ... . If both the assertion and reason are false
Description : Assertion (A) : Tropical rain forests are disappearing fast from developing countries such as India. Reason ( R ) : No value is attached to these fore
Last Answer : Assertion (A) : Tropical rain forests are disappearing fast from developing countries such as India. ... D. If both assertion and reason are false.
Description : Assertion `:-` Pneumotaxic centre can moderate the functions of the respiratory rhythm centre. Reason `:-` Neural signal from pneumotoxic centre can r
Last Answer : Assertion `:-` Pneumotaxic centre can moderate the functions of the respiratory rhythm centre. Reason `:- ... D. If both Assertion & Reason are false.
Description : Assertion (A): UV radiation causes photodissociation of ozone into `O_(2)` and O, thus causing damage to the stratospheric change. Reason (R): Ozone h
Last Answer : Assertion (A): UV radiation causes photodissociation of ozone into `O_(2)` and O, thus causing damage ... true but reason is wrong D. Both are wrong
Description : Assertion (A): Deforestation is one main factor contributing to global warming. Reason (R) : Besides `CO_(2)`, two other gases methane and CFCs are al
Last Answer : Assertion (A): Deforestation is one main factor contributing to global warming. Reason (R) : Besides ` ... true but reason is wrong D. Both are wrong
Description : Assertion (A) : Presently, the global atmosphere is warming up. Reason (R): The depletion of stratospheric ozone layer has resulted in increase in ult
Last Answer : Assertion (A) : Presently, the global atmosphere is warming up. Reason (R): The depletion of ... true but reason is wrong D. Both are wrong
Description : Assertion (A) : Methane component of greenhouse gases contributing to global warming is about 20 per cent. Reason (R) : Introduction of multi-point fu
Last Answer : Assertion (A) : Methane component of greenhouse gases contributing to global warming is about 20 per cent ... but reason is wrong D. Both are wrong
Description : Assertion (A) : Inhabitants close to very busy airports are likely to experience health hazards. Reason (R) : Sound level of jet aeroplanes usually ex
Last Answer : Assertion (A) : Inhabitants close to very busy airports are likely to experience health hazards. Reason ... but reason is wrong D. Both are wrong
Description : Assertion (A) : In a food chain members of successive higher levels are fewer in number. Reason (R ): Number of organisms at any trophic level depends
Last Answer : Assertion (A) : In a food chain members of successive higher levels are fewer in number. Reason (R ... . D. If both assertion and reason are false.
Description : Assertion (A) `:` Replication and transcription occur in the nucleus but translation occurs in the cytoplasm. Reason (R ) `:` m-RNA is transferred fro
Last Answer : Assertion (A) `:` Replication and transcription occur in the nucleus but translation occurs in the ... D. If both assertion and reason are false.
Description : Assertion (A): Pressure, volume, and temperature are all extensive properties. Reason (R ) : Extensive properties depend upon the amount and nature of
Last Answer : Assertion (A): Pressure, volume, and temperature are all extensive properties. Reason (R ) : Extensive ... . D. If both Assertion & Reason are false.
Description : Assertion (A): May endothermic reactions that are not spontaneous at room temperature become spontaneous at high temperature. Reason (R ) : Entropy of
Last Answer : Assertion (A): May endothermic reactions that are not spontaneous at room temperature become spontaneous ... . If both Assertion & Reason are false.
Description : Assertion (A): Enthalpy of graphite is lower than that of diamond. Reason (R ) : Entropy of graphite is lower than that of diamond.
Last Answer : Assertion (A): Enthalpy of graphite is lower than that of diamond. Reason (R ) : Entropy of ... False. D. If both Assertion & Reason are false.
Description : Assertion (A): There is no reaction known for which `DeltaG` is positive, yet it is spontaneous. Reason (R ) : For photochemical reaction, `DeltaG` is
Last Answer : Assertion (A): There is no reaction known for which `DeltaG` is positive, yet it is spontaneous. ... False. D. If both Assertion & Reason are false.
Description : Assertion(A): Physical adsorption of molecules on the surface requires activation energy. Reason(R): Because the bonds of adsorbed molecules are broke
Last Answer : Assertion(A): Physical adsorption of molecules on the surface requires activation energy. Reason(R): ... D. If both Assertion & Reason are False.
Description : Assertion `(A) : K-` shell electron capture is detected by analyzing the wavelength of `X-` ray emitted. Reason `(R):` The wavelength of the `X-` ray
Last Answer : Assertion `(A) : K-` shell electron capture is detected by analyzing the wavelength of `X-` ray emitted. ... D. If both (A) and (R ) are incorrect.
Description : Assertion (A) : `beta`-particles have greater penetrating power than `alpha`-rays but less than `gamma`-rays Reason (R ) : `beta`-particles are lighte
Last Answer : Assertion (A) : `beta`-particles have greater penetrating power than `alpha`-rays but less than `gamma`-rays ... . If both (A) and (R ) are incorrect.
Description : Assertion : The contraction and relaxation of muscle fiber are controlled by nerve impulses. Reason : The threshold stimulus is the minimum stimulus r
Last Answer : Assertion : The contraction and relaxation of muscle fiber are controlled by nerve impulses. Reason : ... D. If both Assertion and Reason are false.
Description : Assertion (A): Alkyl aryl ethers on reaction with HI give alkyl iodide phenols Reason (R): Aryl - oxygen bond is weaker than alkyl oxygen bond
Last Answer : Assertion (A): Alkyl aryl ethers on reaction with HI give alkyl iodide phenols Reason (R): Aryl - oxygen ... is false D. A is false but R is true
Description : Assertion (A): Diethyl ether reacts with hot Conc `H_(2)SO_(4)` and gives ethyl hydrogen sulphate Reason (R): The reaction involves cleavage of C-O bo
Last Answer : Assertion (A): Diethyl ether reacts with hot Conc `H_(2)SO_(4)` and gives ethyl hydrogen sulphate Reason (R ... R is false D. A is false but R is true
Description : Assertion: (A) Ethers are relatively inert when compared to `C_(2)H_(5)OH` Reason (R): The hybridization of C and O in `CH_(3)-O-CH_(3) is SP^(3)`
Last Answer : Assertion: (A) Ethers are relatively inert when compared to `C_(2)H_(5)OH` Reason (R): The hybridization of ... R is false D. A is false but R is true
Description : Assertion: (A) Diethyl ether is used as general anaesthesia Reason (R): Diethyl either produces unconsciousness without effecting lungs
Last Answer : Assertion: (A) Diethyl ether is used as general anaesthesia Reason (R): Diethyl either produces unconsciousness ... false D. A is false but R is true