Answer: B) Mars Explanation: Arsia Mons is among the three volcanos of the planet Mars. Arsia Mons is a shield volcano with a slow slope. Arsia Mons is thirty times in volumes of Mauna Loa in Hawaii, the largest volcano on Earth.

Answer: C) 3 Explanation:

Answer: C) 54 min Explanation: If virus is K in 1hr i.e 60 minthen in 57 min it was K/2 as it doubles every 3 minutes=> In 54 min it was K/4.At 54 minutes it was K/4.

Answer: A) Hydrogen Explanation: Entropy is a measure of disorder . It will be maximum in gases followed by liquids and least in solids.   Hence, here the gas is only hydrogen and it has the highest entropy.

Answer: B) 100 Explanation: Let the Efficiency of pavan be E(P) Let the Efficiency of sravan be E(S) Here Work W = LCM(25,20) = 100 Now, E(P+2S) = 100/25 = 4 ....(1) E(2P+S) = 100/20 = 5 ....(2) Hence, from (1) & (2) we get E(S) = 1 => Number of days Savan alone work to complete the work  = 100/1 = 100 days.

Answer: C) 7 hrs 30 min Explanation: Total number of cards = 1500total columns = 45so, total punches=1500 x 45 = 67500for 1 hour if we make 9000 punches, we require 67500/9000 = 7.5so 7hours:30mins.

Answer: A) Yes Explanation: Yes, plant cells have Mitochondria. While plant cells have chloroplasts to photosynthesize, they also require ATP for cellular functions, and do use oxygen to break down some of the sugar they produce in order to generate that ATP. They need mitochondria for this. In particular, at night when there is no light, plants undergo cellular respiration since there is no sunlight to photosynthesize. They do, however, produce far more sugar and oxygen through photosynthesis than they use up in respiration.

Answer: A) Longitudinal waves Explanation: Compressions and Rarefactions are characteristic of Longitudinal waves. The direction of vibration of the particles is in the same plane as in which the wave is propagating. The particles vibrate back and forth, about their mean positions.