Newspaper can be recycled again and again how many times ?
Newspaper can be recycled again and again how many times ?
A. 2
B. 3
C. 4
D. 5
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Which of the following statements is incorrect about halogens ?
Which of the following statements is incorrect about halogens ?A. All are non-metals
B. All the halogens have electronic conviguration ns2p5
C. They have high electron attinity and ionization energy
D. All the halogens react with noble gases to form their halides_______________ can expel proteons from paraffins ?
_______________ can expel proteons from paraffins ?A. Electron
B. Positron
C. Neutron
D. None of above has such capabilityHydrogen Gas can be prepared by thermal decomposition of Methane in the absence of Air at above____
Hydrogen Gas can be prepared by thermal decomposition of Methane in the absence of Air at above____A. 500⁰C
B. 700⁰C
C. 900⁰C
D. 1300⁰CBoron in soil has been considered micronutrient for_________________?
Boron in soil has been considered micronutrient for_________________?A. Soil porocity
B. Proper growth of plants
C. Alkalinity of soil
D. AllWhich one is false for evaporation ?
Which one is false for evaporation ?A. Surface phenomenon
B. Continuous
C. Exothermic
D. Cause coolingRate of disappearance of reactant is equal to_________________?
Rate of disappearance of reactant is equal to_________________?A. Rate of reaction
B. Rate of formation of product
C. Energy released during reaction
D. A and B