Organic chemistry

1. Which among the following is used in making liquors, medicines and as a fuel in aircrafts? (A) Propyl alcohol (B) Dimethyl alcohol (C) Ethyl alcohol (D) Methyl alcohol Ans. (C) 2.

Metals, Non-metals & Semimetals-4

133. Which of the following elements has the lowest melting point? (A) Titanium (B) Tungsten (C) Argon (D) Nickel Ans. (C) 134. The common name of sulphur is (A) Freon (B) Galena

Metals, Non-metals & Semimetals-2

55. Oxygen is a– (A) Reducing agent (B) Combustion nourishing (C) Constituent of all gas (D) Inflammable gas Ans. (B) 56. Carbon monoxide is an inflammable gas which one of the following

Metals, Non-metals & Semimetals-1

1. Identify the metal which is Non-toxic in nature– (A) Gold (B) Cadmium (C) Cobalt (D) Chromium Ans. (A) 2. Main constituent of liquid bleach is – (A) Hydrochloric acid (B) Sodium


42. Which one of the following Metals is used to Heat up the electric iron? (A) Copper (B) Tungsten (C) Nichrome (D) Tin Ans. (C) 43. Wh ich of the fol lowing


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 Aluminium Ans. (B) 2. The most

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-3

77. What is the common name of Calcium Hypochlorite? (A) Water (B) Bleaching powder (C) Baking soda (D) Baking powder Ans. (B) 78. Spinach contains _____. (A) Lactic Acid (B) Oxalic Acid