1401. Nitrogen is an essential constituent of _________.
D. All of these *
1402. Matter is made up of small particles called ________.
A. Atoms *
1403. Which of the following two elements are present in the largest number of compounds ?
A. Carbon and Hydrogen *
B. Carbon and Nitrogen
C. Carbon and Oxygen
D. Oxygen and Hydrogen
1404. Which of the following metals has the lowest metling point?
C. Potassium *
1405. Which of the following has the lowest ionisation potential?
D. Iodine *
1406. All of the following are area of copper except?
B. Cinnabar *
C. Copper Pyrites
1407. Most reactive element among the following is ______.
A. Fluorine *
1408. The process which brings about chemical decomposition of a substance by water is called ______.
D. Hydrolysis *
1409. How many kinds of rays-do radioactive elements emit?
B. Three *
1410. Liver, Milk, Egg Yolk, fish liver oil are teh source of Vitamin?
D. D *