Answer: C) 2 Explanation: Here the most stable carbocation is the option (2).   Carbocations are always hungry for electrons. The stability of carbocations increases from primary to secondary to tertiary. Here, option (c) shows the most stable carbocation because it can easily withdraw electrons from two other carbon atoms and the more electronegative oxygen atom.   Carbocation stability depends on hyperconjugation. The tertiary carbocation is stabilized by electron releasing inductive effect.

Answer: A) Chloroplasts and Mitichondria Explanation: DNA can be found in 3 Organelles namely Nucleus, Mitochondria in animals and Chloroplasts in plants.

Answer: D) Rs. 1530 Explanation: Ratio of investments of A, B & C => Share of C = 1530 Share of B = 765 Share of A = 1020

Answer: C) Rs. 10664.15 Explanation: Profit received by Chinna as working partner = 14.5% of Rs. 19600 = 14.5x19600/100 = Rs. 2842 Balance in profit = 19600-2842 = Rs. 16758 Ratio of investment of Chinna & Munna = 80,000 : 1,40,000 = 4 : 7 Hence share of Chinna in investment = 4x16758/100 = Rs. 6093.85 Therefore, Share of Munna = 19600 - 2842 - 6093.85 = Rs. 10664.15

Answer: C) DNA Explanation: The most important polymer present in the nucleus is DNA- the master molecule. It is a polymer of Nucleotides.

Answer: D) The sequence of amino acids in the polypeptide chain differs from protein to protein Explanation:

Answer: C) Umbrella Explanation: Yes, when rain starts falling umbrella goes up for pretecting us from wetting.

Answer: B) 60 Explanation: -5-----------------------5-------------------20 5-(-5) = 10 20-5= 15 Ratio of cost price of book1 and book2 = 3:2  Then cost price of book 1 is given by (3/5) x 100 = Rs. 60.