Q.1:- Kerosene is a mixture of……….?
Ans: – Aliphatic Hydrocarbons
Q.2 :- Which elements is a metalloid ?
Ans: – As
Q.3:- What does Stainless Steel Contain?
Ans: – Fe + Cr + Ni
Q.4:- Give the one name of the element which does not have an allotrope?
Ans: – Nitrogen
Q.5:- The deficiency of which element leads to dental caries?
Ans: – Fluorine
Q.6:- Which gas is used in filling electric bulbs?
Ans:- Argon
Q.7:- In chemical terms, what are alums used for purifying water for drinking purposes?
Ans:- Double Sulphates
Q.8:- Give one example of non-mixture?
Ans:- Graphite
Q.9:- Which one elements exists in liquid state at room temperature?
Ans:- Mercury
Q.10:- The metal constituent of chlorophyll is?
Ans:- Magnesium
Q.11:- Give the name of one metals that occurs in nature in free state?
Ans:- Gold
Q.12:- Oils are purified by ?
Ans:- Steam Distillation
Q.13:- What is used as a moderator in nuclear reactors?
Ans:- Heavy Water
Q.14:- Which gas is commonly used in anaesthesia?
Ans:- Nitrous Oxide
Q.15:- Give one example of a balanced chemical equation?
Ans:- 2NaOH + 2Al + 2H2O → 3H2 + 2NaAlO2
Q.16:- Give one example of an element?
Ans:- Graphite
Q.17:- Which element (metal) pollutes the air of a city having large number of automobiles?
Ans:- Lead
Q.18:- Give the name of one non-nitrogenous fertilizer?
Ans:- Ca(CN)2
Q.19:- What is responsible for blue baby syndrome?
Ans:- Nitrate
Q.20:- The metal compound commonly found in Sindhoor or Kumkum is based on?
Ans:- Lead
Q.21:- Which gas is responsible for the swelling of bread?
Ans:- Carbon Dioxide
Q.22:- The inert gas abundantly found in atmosphere is?
Ans:- Ar
Q.23:- Candles contains a mixture of?
Ans:- Paraffin Wax and Stearic Acid
Q.24:- Which is the rarest naturally occurring element of earth?
Ans:- Astatine
Q.25:- Give the name of one noble gas which is not found in the atmosphere?
Ans:- Radon
