Answer: A) 63 g/mol Explanation: Calculation of molar mass of HNO3: Atomic masses of H, N, O are 1, 14, 16 respectively Now the molar mass of HNO3 is HNO3 = 1X1 + 1X14 + 3X16 = 1 + 14 + 48 = 63 g/mol or amu.

Answer: A) A & B Explanation: A) Cooking of Food  ------ Chemical Change B) Digestion of Food ----- Chemical Change C) Freezing of water ----- Physical Change D) Water is heated up ---- Physical Change because here the chemical composition of the substance changes in A & B only.   Since we know that, If the chemical composition is changing then it is a chemical change and if the chemical composition is remaining the same, then it is a physical change.

Answer: C) The Civil Rights movement Explanation: The Civil Rights Movement :   The Civil Rights Movement in the United States was a struggle by black Americans to gain full citizenship rights and achieve racial equality. Individuals and organizations challenged discrimination with a variety of activities, including protest marches, boycotts, and refusal to abide by segregation laws. Many believe that the movement began with the bus boycott in Montgomery, Alabama, in 1955 and ended with the Voting Rights Act of 1965.

Answer: A) 2 years Explanation:

Answer: B) 12 Explanation: There are 12 Indian origin persons in the "House of Commons".   The House of Commons is the elected lower house of the bicameral parliaments of the United Kingdom. The UK public elects 650 Members of Parliament (MPs) to represent their interests and concerns in the House of Commons. MPs consider and propose new laws, and can scrutinise government policies by asking ministers questions about current issues either in the Commons Chamber or in Committees.

Judaism is one of the oldest monotheistic religions and was founded over 3500 years ago in the Middle East.   Jews believe that God appointed the Jews to be his chosen people in order to set an example of holiness and ethical behaviour to the world.

Answer: B) Slavery Explanation: The Indian Slavery Act, also called as Act 5th of 1843, was an act passed in British India under East India Company rule, which outlawed many economic transactions associated with slavery.

Answer: A) 28.5 yrs Explanation: According to the given data, (V + R)/2 = 24 Now, after joining of Veerender, V + R + D)/3 = 25.5 Hence, Veerender Age = 3(25.5) - 2(24) = 76.5 - 48 = 28.5 years.