Description : In the following reactions `2X+B_(2)H_(6) to [BH_(2)(X)_(2)]^(+){BH_(4)]^(-)` The amine X will not be -
Last Answer : In the following reactions `2X+B_(2)H_(6) to [BH_(2)(X)_(2)]^(+){BH_(4)]^(-)` The amine X will not be - A. ... C. `(CH_(3))_(2)NH` D. `(CH_(3))_(3)N`
Description : Maximum no. of atonms laying in a same planar in `B_(2)H_(6)` are :-
Last Answer : Maximum no. of atonms laying in a same planar in `B_(2)H_(6)` are :- A. 8 B. 4 C. 6 D. 2
Description : Borazole `(B_(3)N_(3)H_(6))` is related to benzene as
Last Answer : Borazole `(B_(3)N_(3)H_(6))` is related to benzene as A. isostructural B. isoelectronic C. both (1) and (2) D. none
Description : `B_(3)^(3-)+Conc.H_(2)SO_(4)+CH_(3)-CH_(2)-OH overset(ignite)rarr(A)` What is the oxidation number of central atom that is responsible for green flame
Last Answer : `B_(3)^(3-)+Conc.H_(2)SO_(4)+CH_(3)-CH_(2)-OH overset(ignite)rarr(A)` What is the ... atom that is responsible for green flame in compound `(A)`?
Description : Choose the set coefficients that correctly balances the following equation : `xCr_(2)O_(7)^(2-)+yH^(+)+ze^(-)rarraCr^(+3)++bH_(2)O`
Last Answer : Choose the set coefficients that correctly balances the following equation : `xCr_(2)O_(7)^(2-)+yH^(+)+ze^(-)rarraCr^(+ ... (x,y,z,a,b),(2,7,6,1,7):}`
Description : Number of halides undergoing complete reaction in presence of water under normal conditions is : (i) `BF_(3)` (ii) `BCl_(3)` (iii) `NCl_(3)` (iv) `AlC
Last Answer : Number of halides undergoing complete reaction in presence of water under normal conditions is : (i) `BF_(3)` (ii ... (vi) `PCl_(3)` (vii) `AsCl_(3)`
Description : What is the meaning of Dimer ?
Last Answer : A compound consisting of 2 monomers is called a dimer.
Description : How many hydrogen bonds are there in the dimer formation of ethanoic acid ?
Last Answer : Answer : Ethanoic acid has two hydrogen bonds in its dimer structure.
Description : DNA-dependent RNA polymerase is a (A) Monomer (B) Dimer (C) Trimer (D) Tetramer
Last Answer : Answer : D
Description : Ultraviolet light can damage a DNA strand causing (A) Two adjacent purine residue to form a covalently bounded dimer (B) Two adjacent pyrimidine residues to form covalently bonded dimer (C) Disruption of phosphodiesterase linkage (D) Disruption of non-covalent linkage
Last Answer : Answer : B
Description : Insulin receptor is a (A) Monomer (B) Dimer (C) Trimer (D) Tetramer
Description : Thyroid stimulating hormone is a dimer. The α-subunits of TSH, LH, FSH are identical. Thus the biological specificity must therefore be β subunit in which the number of amino acids is (A) 78 (B) 112 (C) 130 (D) 199
Description : Lactate dehydrogenase is a (A) Monomer (B) Dimer (C) Tetramer (D) Hexamer
Last Answer : Answer : C
Description : Bence-Jones protein is (A) An immunoglobulin (B) A dimer of heavy chains (C) A dimer of light chains (D) A dimer of one heavy and one light chains
Description : Thiamidine dimer formation in DNA is caused by - (1) IR-rays (2) X-rays (3) b and g-rays (4) UV-rays
Last Answer : (4) UV-rays Explanation: When cells are exposed to sunlight, radiant energy damage the DNA. For example, ultraviolet irradiation causes covalent bond formation between adjacent thymines on the same strand of ... . This added energy opens up the bond and allows it to react with a neighboring base.
Description : For bactericidal activity,__________ has/have the ability to cause thymine dimer formation. a. X rays b. B ultraviolet light a. Gamma Rays b. Microwaves
Last Answer : b. B ultraviolet light
Description : Thiamidine dimer formation in DNA is caused by (1) IR-rays (2) X-rays (3) b and g-rays (4) UV-rays
Last Answer : UV-rays
Description : Assertion `:` Deficiency of vitamin `B_(12)` and folic acid can cause anaemia. Reason `:-` Vitamin `B_(12)` and folic acid are essential for maturatio
Last Answer : Assertion `:` Deficiency of vitamin `B_(12)` and folic acid can cause anaemia. Reason `:-` Vitamin ... False. D. If both Assertion & Reason are false.
Description : Vitamin `B_(12)` consists of which type of alement ?
Last Answer : Vitamin `B_(12)` consists of which type of alement ? A. Co B. Nicotin C. Fe D. None of these
Description : Thiamine `B_(1)` deficiency leads to
Last Answer : Thiamine `B_(1)` deficiency leads to A. Beri-beri B. Rickets -Vitamin D C. Caries D. Pellagra
Description : `A_(3)B_(2)` is a sparingly soluble salt with molar mass `M(gmol_(-))` and solubility `x` gm `litre_(-1)`, the ratio of the molar concentration of `B^
Last Answer : `A_(3)B_(2)` is a sparingly soluble salt with molar mass `M(gmol_(-))` and solubility `x` gm `litre_(-1)`, the ... `(1)/(54)(M^(4))/(x^(4))` D. None
Description : `Na_(2)B_(4)O_(7).10H_(2)O` is correctly represent by
Last Answer : `Na_(2)B_(4)O_(7).10H_(2)O` is correctly represent by A. `2NaBO_(2).Na_(2)B_(2)O_(3).10H_(2)O` B. `Na_ ... H_(2)O)_(4)O_(7)].6H_(2)O` D. None of these
Description : In the reaction , `4A+2B+3CtoA_(4)B_(2)C_(3)` what will be the number of moles of product formed , starting from 1 mole of A,06 mole of B and 0.72 mol
Last Answer : In the reaction , `4A+2B+3CtoA_(4)B_(2)C_(3)` what will be the number of moles of product formed , starting from 1 ... A. 0.25 B. 0.3 C. 2.4 D. 0.24
Description : The possible number of stereoismers for the formula `[Ma_(2)b_(2)cd]^(pmn)`.
Last Answer : The possible number of stereoismers for the formula `[Ma_(2)b_(2)cd]^(pmn)`.
Description : In Borax bead test, metal oxides react with `B_(2)O_(3)` and form a coloured bead. This bead contains
Last Answer : In Borax bead test, metal oxides react with `B_(2)O_(3)` and form a coloured bead. This bead ... B. metaborate ion C. double oxide D. tetraborate ion
Description : Assertion If velocity of charged particle in a uniform magnetic field at some instant is `(a_(1)hat(i)-a_(2)hat(j))` and at some other instant is `(b_
Last Answer : Assertion If velocity of charged particle in a uniform magnetic field at some instant is `(a_(1)hat(i ... D. If Assertion is false but Reason is true.
Description : Assertion In a uniform magnetic field `B=B_(0)hat(k)`, if velocity of a charged particle is `v_(0)hat(i)` at t = 0, then it can have the velocity `v_(
Last Answer : Assertion In a uniform magnetic field `B=B_(0)hat(k)`, if velocity of a charged particle is `v_( ... . D. If Assertion is false but Reason is true.
Description : When a certain length of wire is turned into one circular loop, the magnetic induction at the centre of coil due to some current flowing is `B_(1)` If
Last Answer : When a certain length of wire is turned into one circular loop, the magnetic induction at the centre of coil due to ... 1)` C. `3B_(1)` D. `27B_(1)`
Description : Two charged particles traverse identical helical paths in a completely opposite sense in a uniform magnetic field `vec(B)=B_(0)hat(K)`
Last Answer : Two charged particles traverse identical helical paths in a completely opposite sense in a uniform magnetic field `vec(B)=B_ ... + ((e)/(m))_(2) = 0`
Description : The magnetic field at the centre of a circular coil of radius `r` carrying current `l` is `B_(1)`. The field at the centre of another coil of radius `
Last Answer : The magnetic field at the centre of a circular coil of radius `r` carrying current `l` is `B_(1)`. The field at the ... `1//2` B. `1` C. `2` D. `4`
Description : A particle of mass m and having a positive charge q is projected from origin with speed `v_(0)` along the positive X-axis in a magnetic field B = `-B_
Last Answer : A particle of mass m and having a positive charge q is projected from origin with speed `v_(0)` along the positive ... /(qB)` D. `(2mv_(0))/(qB_(0))`
Description : `B_(1), B_2 and B_3` are the three identical bulbs connected to a battery of steady emf with key `K` closed. What happens to the brightness of the bul
Last Answer : `B_(1), B_2 and B_3` are the three identical bulbs connected to a battery of steady emf with key `K` ... of the bulbs `B_(1)` and `B_(2)` decreases
Description : How many cyclic isomers isomers (structrural and geometrical only) exist for `C_(5)H_(10)`?
Last Answer : How many cyclic isomers isomers (structrural and geometrical only) exist for `C_(5)H_(10)`?
Description : STATEMENT-1: The oxidation state of S in `H_(2)S_(2)O_(8)` is 6. STATEMENT-2: Maximum oxidation state of A is 6 because the maximum oxidation state of
Last Answer : STATEMENT-1: The oxidation state of S in `H_(2)S_(2)O_(8)` is 6. STATEMENT-2: Maximum ... D. Statement-I is not correct and Statement-II is correct
Description : Amino acids excepting histidine are not good buffering agents in cell because (A) They exist as zwitter ions (B) Their pk and not in the physiological pH of a cell (C) Only Histidine has pk of its R group at 6.0 unlike the others which have at a different pH (D) None of these
Description : Electron can exist in the atom but outside the nucleus because a) speed of electron is equal to the speed of light b) speed of electron is more than speed of light c) speed of electron is less than speed of light d) None of these
Last Answer : c) speed of electron is less than speed of light
Description : Assertion:- `SF_(6)` cannot be hydrolysed but `SF_(4)` can be. Reason:- Six F atoms in `SF_(6)` prevent the attack of `H_(2)O` on sulphur atom of `SF_
Last Answer : Assertion:- `SF_(6)` cannot be hydrolysed but `SF_(4)` can be. Reason:- Six F atoms in ` ... D. Statement-I is not correct and Statement-II is correct
Description : The formation of water from `H_(2)(g)` and `O_(2)(g)` is an exothermic process because :
Last Answer : The formation of water from `H_(2)(g)` and `O_(2)(g)` is an exothermic process because : A. The ... ` and `O_(2)(g)` is lower than that of water
Description : `H_(2)O_(2)+H_(2)O_(2)rarr2H_(2)O+O_(2)` is an example of dispropotionation because -
Last Answer : `H_(2)O_(2)+H_(2)O_(2)rarr2H_(2)O+O_(2)` is an example of dispropotionation ... D. Oxidation number of oxygen neither decreases nor increases
Description : Concentrated `H_(2)SO_(4)` cannot be used to prepare HBr from NaBr , because it ,
Last Answer : Concentrated `H_(2)SO_(4)` cannot be used to prepare HBr from NaBr , because it , A. (A) ... (C) disproportionates HBr D. (D) reacts slowly with NaBr
Last Answer : Concentrated `H_(2)SO_(4)` cannot be used to prepare HBr from NaBr , because it ,
Description : Oxyen is more eletrongative than sulphur, yet `H_(2)S` is acidic while `H_(2)O` in neutral.this is because:
Last Answer : Oxyen is more eletrongative than sulphur, yet `H_(2)S` is acidic while `H_(2)O` in neutral.this is because: A ... (2)S` is more than that of `H_(2)O`.