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Which of the following property in a group decrease down the group and increase down the group respectively.

a) electronegativity and atomic radius b) electronegativity and electro gain enthalpy c) atomic radius and electronegativity d) electro gain... View Article

Considering MOT comment on the stability:

a) Li2+ stable Li2−unstable b) Li2+ unstable Li2−unstable c) Li2+ unstable Li2− unstable d) Li2+ stable Li2– stable... View Article

Which of the following ore contains iron and copper

a) Malachite b) Azurite c) Copper pyrite d) None of these Answer: (c) Malachite – Copper ore CuCO3 Cu(OH)2 . Azurite – Copper... View Article

Which of the following alkaline earth metal nitrate does not crystalline with water of crystallization?

a) Ca(NO3)2 b) Mg(NO3)2 c) Sr(NO3)2 d) Ba(NO3)2 Answer: (d) •It depends on the polarization power of cation. • The atom which is... View Article

Which of the following is strongest acid

a) CHCl3 b) CHI3 c) CHBr3 d) CH (CN)3 Answer: (d) Order lies with –I and –M effect. -I and –M effect in CN is more when... View Article

Presence of which makes water unsuitable for drinking.

a) Fe = 0.2 ppm b) Cu = 2 ppm c) Mn = 0.5 ppm d) Zn = 0.05 ppm Answer: (c) Fact from NCERT Presence of Mn ≥ 0.05 ppm concentration makes... View Article

Arrange the following in order of K _a value

(P) FCH2COOH (Q) ClCH2COOH (R) O2NCH2COOH (S) NCCH2COOH a) P > Q > R > S b) R > S > P > Q c) R > P > S > Q d)... View Article

Product ‘x’ major will be

Answer: (c) It involves Electrophilic addition of alkenes, followed by Nucleophilic substitution mechanism.... View Article

Arrange the following in order of K_b value

a) P > Q > R b) Q > P > R c) R > P > Q d) R > Q > P Answer: (c) This nitrogen contains 3σ bond and its... View Article

Which of the following are isotope of hydrogen

a) Deutrium, Protium b) Deutrium, Tritium c) Deutrium, Tritium, Protium d) Protium Answer: (c) 1H1,1H2,1H3 Protium, Deutrium and Tritium... View Article

Given a mixture with 0.5 mole of gas A and X moles of gas B. Total pressure is 200 pa at 1000 k temperature in a vessel of volume 10m³. Then, find x. (R is universal gas constant).

a) (4-R)/2R b) (4+R)/2R c) (2-R)/2R d) 2/2 Answer: (a) Given: Mix – Gas A + Gas B Gas A = 0.5 mole and Gas B = x mole Total pressure... View Article

In hydrogen emission spectrum electron transition takes place from n = 8 to n = n_f. If we plot this graph of ῡ vs (1/nf² ). Which of the following statement is correct.

a) Slope = −RH b) Slope = RH c) Intercept = RH d) Graph is non-linear Answer: (b) Transition state = n = 8 to n = nf Graph (ῡ vs... View Article

0.05 F charge is passed through a lead storage battery. In the anodic reaction, what is the amount of PbSO₄ precipitated (Molar mass of PbSO₄ is 303 g/mol)

a) 30.3 g b) 15.5 g c) 7.6 g d) 60.6 g Answer: (c) Charge = 0.05 F Amount of PbSO4 precipitated = W Molar mass of PbSO4 = 303 g/mol... View Article

2a plus b gets product

[A] [B] Rate (M min-1 ) 0.1 0.20 6.93 x 10-3 0.1 0.25 6.93 x 10-3 0.2 0.3 1.386 x 10-2 Time when concentration of A becomes half a)... View Article

Which of the following is not correct about Henry’s law.

a) On increasing temperature value of KH increases b) Value of KH increases solubility of gas increases c) Value of KH for two different gases... View Article

20 ml of 0.1 M H₂SO₄ is added to 30 ml of 0.2 M NH ₄OH then calculate pH of resultant solution. (Given that P ^Kb of NH₄OH is 4.7)

a) 9 b) 9.4 c) 5.2 d) 5 Answer: (a) H2SO4+2 NH4OH → (NH4)2SO4+ H2O 20 × 0.1 ; 30 × 0.2 It is a complete... View Article

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