Day 198: JEE Mains Chemistry

1. A.
2. B.
3. C.
4. D.
   Both (a) and (c)

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1. A.
   Compounds are formed when atoms of different elements combine in any ratio
2. B.
   All the atoms of a given element have identical properties including identical mass
3. C.
   Matter consists of indivisible atoms
4. D.
   Chemical reactions involve reorganization of atoms

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1. A.
   prevent oxidation
2. B.
   prevent reduction
3. C.
   prevent hydrolysis
4. D.
   prevent breaking

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1. A.
   ${NH}_{2}OH.HCl$
2. B.
   ${CH}_{3}{NH}_{2}.HCl$
3. C.
   ${NH}_{4}Cl$
4. D.
   $N_{2}H_{4} \cdot HCl$

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