Question
Divide and simplify the expression: 4 1/2 / 2 3/8
- 1 35/19
- 1 16/19
- 1 17/19
- 1 18/19
The correct answer is: 1 17/19
Convert the mixed fractions into improper fractions
= (4*2+1)/2 / (8*2+3)/8
= (9/2) / (19/8)
To divide fractions, multiply the dividend by the reciprocal of the divisor.
9/2*8/19= 72/38= 36/19= 1 17/19
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f pressure is applied on the given chemical equilibrium, then equilibrium will shift towards 
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Adding alum to turbid water, impurities are removed due to -
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Assertion: Alcohols are dehydrated to hydrocarbons in presence of acidic zeolite.
Reason : Zeolites are porous catalyst.
Assertion: Alcohols are dehydrated to hydrocarbons in presence of acidic zeolite.
Reason : Zeolites are porous catalyst.
Assertion: The reaction of oxalic acid with acidified 
is first slow and then proceed with faster speed.
Reason : Acidified is a strong oxidising agent.
Assertion: The reaction of oxalic acid with acidified is first slow and then proceed with faster speed.
Reason : Acidified is a strong oxidising agent.
Assertion: Gold sol is hydrophobic and multimolecular:
Reason : Gold sol is prepared by Bredig's arc method.
Assertion: Gold sol is hydrophobic and multimolecular:
Reason : Gold sol is prepared by Bredig's arc method.
Assertion: 
can be used for coagulation of 
sol.
Reason: reacts with to give 
.
Assertion: can be used for coagulation of sol.
Reason: reacts with to give .
