Although metals forms basic oxides, which of the following metals form an amphoteric oxide?
Reaction between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?
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Which among the following statements is incorrect for magnesium metal?
Which of the following can undergo a chemical reaction?
Two ml each of concentrated HCl, HNO3 and mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C. The metal could be.
If copper is kept open in air, it slowly losses its shining brown surface and gains a green coating. It is due to the formation of
Silver articles become black on prolonged exposure to air. This is due to the formation
Which of the following metals exist in their native state
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
The electronic configuration of three elements X, Y and Z are X—2, 8; Y—2, 8, 7 and Z—2, 8, 2 which of the following is correct?
Which of the following statement is not correct?
Which of the following are not ionic compounds?
(i) KCl
(ii) HCl
(iii) CCl4
(iv) NaCl
Which of the following ore cannot be concentrated by electromagnetic separation?
Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg) ?
All ores are minerals but all mineral are not
13 videos|44 docs|187 tests
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13 videos|44 docs|187 tests
|