1. Major portion of the earth’s crust is mainly constituted by (A) Oxygen and Iron (B) Oxygen and Silicon (C) Silicon and Iron (D) Silicon and Aluminiu 2. The most abundant metal

Periodic table

1. Who proposed the Modern Periodic Table? (A) Faraday (B) Mendeleev (C) Newton (D) Bohr Ans. (B) 2. Total number of Inner Transition Elements are– (A) 16 (B) 28 (C) 32 (D)

Chemical Bonding

1. Formation of cation occurs by– (A) Gain of electron (B) Loss of electron (C) Gain of proton (D) Loss of proton Ans. (B) 2. Formation of anions occurs by– (A) Loss

Acid, Base & Salt

1. Which of the following is the strongest acid? (A) CF3COOH (B) CBr3COOH (C) CH3COOH (D) CCl3COOH Ans. (A) 2. Which of the following is the weakest acid? (A) C6H5OH (B) CH3COOH

Redox Reactions

1. What happens in an Oxidation reaction? (A) Protons are lost (B) Electrons are lost (C) Neutrons are lost (D) Electrons are gained Ans. (B) 2. Which among the following is not

Radioactivity & Nuclear Chemistry

1. Radioactivity is the fission of – (A) Nucleus (B) Ion (C) Atom (D) Molecule Ans. (A) 2. What is the unit of the physical quantity, Radio-Activity? (A) Radian (B) Becquerel (C)

Atomic Structure

1. ‘Atomic theory’ of the matter was given by (A) Avogadro (B) Dalton (C) Newton (D) Pascal Ans. (B) 2. Atomic size is of the order of— (A) 10–8 cm (B) 10–10