Chemistry-
General
Easy
Question
Cryolite is :
- sodium fluoride
- aluminium fluoride
- sodium aluminium fluoride
- none of the above
The correct answer is: sodium aluminium fluoride
Cryolite is AlF3.3NaF or Na3AlF6
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All ores are minerals while all minerals are not ores because:
All ores are minerals while all minerals are not ores because:
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Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
i)Ag
ii)Cu
iii)Na
iv)Al.
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
i)Ag
ii)Cu
iii)Na
iv)Al.
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Corrosion or rusting can be prevented by
Corrosion or rusting can be prevented by
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An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:
Chemistry-General
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Which of the following metals is protected by a layer of its own oxide?
Which of the following metals is protected by a layer of its own oxide?
Chemistry-General
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The correct decreasing order of the metals in the activity series is:
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The order of reactivity with oxygen is in the order
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H2SO4 acts as dehydrating agent in its reaction with
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Chemistry-General
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When an aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change observed is that
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Chemistry-General
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A student puts one big iron nail in four test tubes containing solutions of zinc sulphate, aluminium sulphate, copper sulphate and iron sulphate. A reddish brown coating was observed only on the surface of iron nail which was put in the solution of:
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The correct order of decreasing reactivity of Zn, Cu, Fe and Al is:
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Generally non-metals are not lustrous. Which of the following non-metal is lustrous?
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Chemistry-General
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Statement–1: 
. If more Cl2 is added the equilibrium constant will decrease.
Statement–1 : Addition of inert gas to the equilibrium mixture at constant volume does not alter the equilibrium.
Statement–1: . If more Cl2 is added the equilibrium constant will decrease.
Statement–1 : Addition of inert gas to the equilibrium mixture at constant volume does not alter the equilibrium.
Chemistry-General
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Statement–1: For 
the equilibrium constant is ‘K’ then for 
the equilibrium constant will be 
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Statement–2 : If concentration are changed to half the equilibrium constant will be halved.
Chemistry-General
