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Chemistry

346)Which one of the following is ore of Radium?
Haematite Pitchblende
Bauxite Lime stone
Answer :

347)Which one of the following is same as alpha particle?
Hydrogen nucleus Proton
Neutron Helium nucleus
Answer :

348)Which one of the following is number of molecules in one mole of gas?
6.023 x 1023 6.023 x 1022
6.023 x 1019 6.023 x 10-23
Answer :

349)The factor(s) that affect(s) the rate of reaction-
pressure catalyst
temperature all of these
Answer :

350)Which one of the following diseases is treated by Cobalt-60 isotope?
Malaria Cancer
Tuberculosis Heart disease
Answer :

351)The substance that reduce the rate of reaction is called-
Negative catalyst Positive catalyst
Auto catalyst Catalystic position
Answer :

352)Which one of the following is the volume of one mole of gas at NTP?
11.2 litre 11.2 millilitre
22.4 litre 22.4 millilitre
Answer :


353)Which of the following is the use of Carbon - 12?
Producing heavy water Treating cancer patient
Determination age of an object None of these
Answer :

354)Which one of the following is example of thermal decomposition?
2Hg2O → 2H2 + O2<,sub> 2HgO → 2Hg + O2<,sub>
2AgBr2 → 2Ag + Br2<,sub> None of these
Answer :

355)The reaction - NaCl → Na+ + Cl- is
an addition reaction a ionic dissociation reaction
double decomposition reaction substitution reaction
Answer :

356)The reaction of acetylene with hydrogen in the presence of red hot nickel is
an addition reaction a substitution reaction
a dissociation reaction a decomposition reaction
Answer :

357)The reaction AgNO3 + NaCl → AgCl + NaNO3 is
decomposition reaction substitution reaction
dissociation reaction double decomposition reaction
Answer :

358)Which one of the following is used as catalyst in the hydrogeneration of oil?
Ni Mo
Fe Pt
Answer :

359)At the end the chemical reaction the mass of catalyst -
decrease increase
remain same sometimes increases sometimes decreases
Answer :

360)Compound with covelent bond is more soluble in
organic solvent water
both (a) and (b) none of these
Answer :

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