The acid used in lead storage cells is
1). phosphoric acid
2). hydrochloric acid
3). nitric acid
4). sulphuric acid
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1. Which of the following is used to remove ink and rust stains on cloth?
2. Which of the following elements is obtained from seaweeds ?
4. 'Fire-fighting clothes' are made from
5. The enzyme that converts glucose to ethyl alcohol is :
6. Which among the following coal contains 90 per cent of carbon?
7. The example of oligosaccharide is
8. Which leader of British Labour Party was recently elected the first Muslim Mayor of London?
10. Question 1.1:Calculate the molecular mass of the following:(i) H2O (ii) CO2 (iii) CH4