science 12 grade

Question 1 - Question: In water, hydrogen and oxygen are present in the ratio of ________. 1. 1:8 2. 2:12 3. 2:3 4. 1:2 Answer:..

Question: A body moving along a straight line at 20 m/s decelerates at the rate of 4 m/s 2 . After 2 seconds its speed will be equal to 1. 8 m/s 2. 12 m/s 3. 16 m/s 4. - 12 m/s Answer: ..

Goats are fed with fresh fodder, hay of leguminous plants such as barseems and tender leaves of trees. The ideal ration for the goat is 5 kg roughage (3-4 kg green fodder and 1-2 kg dry fodder) and 250 g concentrates. Mineral mixture, oil cakes, pulses, sesame, corn and jowar are also fe..

Question: A certain health conscious person needs to choose between milk of the Surti and the Murrah. Which one should he/she choose? Answer: He/she should opt for the milk from the Murrah as its fat content (<7%) is lesser than that of the Surti (8%-12%)..

Question: There are ___________ pairs of cranial nerves. 1. 21 2. 31 3. 41 4. 12 Answer: ..

Mass of the dog (m) = 20 kg Velocity (v) = 12 m/s Kinetic energy of the dog = 144..

Element % by wt At wt Rlative No.of Atoms Simple Ratio C 40 12 40/12 = 3.33 3.33/3.33 = 1 H 6.67 1 6.67/1 = 6.67 6.67/3.33 = 2 O 100 - 46.67 16 53.33/16 = 3.33 3.33/3.33 = 1 Empirical formula = C 1 H 2 O 1 Empirical formula weight = 12..

Since it is not possible to calculate the weight of particles individually, a collection of such particles called mole is taken for all practical purposes. It was discovered that the number of atoms present in 12g of carbon of 12 C isotope is 6.023 x 10 23 atoms. This is referre..

Question: If the distance between two bodies is doubled, the force of attraction F between them will be _______ 1. 1/4 F 2. 2 F 3. 1/2 F 4. F A nswer: ..

Question: The unlikely row pattern practiced in intercropping is_________. 1. 1:1 2. 1:2 3. 1:3 4. 1:4 Answer: ..