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(3) Quantum numbers

Which of the following is not a chemical reaction? 1 Burning of paper 2 Digestion of food 3 Conversion of water into steam 4 Burning of coal

1 Answers   NTS,

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What is condensation? 1 Change of gas into solid 2 Change of solid into liquid 3 Change of vapour into liquid 4 Change of heat energy into cooling energy

2 Answers  

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the basic approach to science was established by:

0 Answers   APPSC, Government,

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Which of the following reactions is used for increasing the number of carbon atoms in a chain? 1 Substitution reaction 2 Wurtz reaction 3 Friedel – Crafts reaction 4 Cannizzaro’s reaction

2 Answers  

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Polythene is industrially prepared by the polymerization of 1 Methane 2 Styrene 3 Acetylene 4 Ethylene

3 Answers   Amna Industries, HFI,

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Catalytic properties of a substance may be best defined as a phenomenon of 1 Absorption 2 Chemisorption 3 Adsorption 4 None of these

1 Answers  

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Combustion is the process in which 1 Heat is produced 2 Light is produced 3 Heat and light are produced 4 None of these

1 Answers  

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when u step up the voltage using atransformer ,,,then what about the secondary current will it be increased or decreased ?

1 Answers  

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Which of the following gases is lighter than air? 1 Carbon dioxide 2 Oxygen 3 Ammonia 4 Chlorine

5 Answers  

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Epoxy resins are used as 1 Moth repellants 2 Insecticides 3 Detergents 4 Adhesives

1 Answers  

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why ammonia cylinder getting icing outside of cylinder when it approx half or less than it...??

0 Answers  

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Which of the following acids is used for ‘etching glass’? 1 HBrO3 2 H2F2 3 HCIO4 4 HIO4

1 Answers  

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