Match list (I) with list (II) and select the chemicals found in the products using the code given below the lists:
List (I) Products List (II) Chemicals
I. Gypsum 1) Silicon Dioxide
II. Cement 2) Calcium Sulphate
III. Pyrex Glass 3) Iron and Carbon
IV. Steel 4) Boron
Question 2
The Soda-acid fire extinguisher contains
Question 3
Match the following organic compound with their functional group -
Question 4
Consider the following statements.
1) The element carbon forms a very large number of compounds.
2) Air holes of a gas burner have to be adjusted when the heated vessel get blackened by the flame.
3) Use of synthetic detergents does not cause pollution of water.
Which of the above statements are true?
Question 5
Consider the following
1) Synthetic elements are created by human.
2) Most of the synthetic elements are located in 7th group of the periodic table.
3) The atoms of some synthetic elements now present on Earth are products of atomic bombs.
Which of the following is/are true about synthetic element?
Question 6
Consider the following statements and select the correct code.
Assertion (A): In the periodic table of chemical elements, from top to bottom in a group electron affinity will always increase.
Reason (R): The atomic radii generally increase from top to bottom in a group.
Question 7
Which one of the following is not a periodic property i.e. does not show any trend on moving from one side to the other in the periodic table ?
Question 8
Pentanoic acid is commonly called ________.
Question 9
Assume you have four test tubes labelled as ‘P’, ‘Q’, ‘R’ and ‘S’. ‘P’ contains plain water, ‘Q’ contains the solution of an alkali, ‘R’ contains the solution of an acid, and ‘S’ contains the solution of sodium chloride.
Which one of the given solutions turns to phenolphthalein solution?
Question 10
During dilution of an acid, it is recommended that the acid should be added to water and not water to the acid, why?
