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Chemistry Preparation for SAT

(7 Posts)

This thread is dedicated to preparation for Chemistry section of SAT (Subject).

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Prince Tyagi
Posted on Feb 17, 2019 9:52 AM

How many stereoisomers are possible for the compound : 4 –phenyl but -3-en-2 –ol?

 
1
2
3
4
5
Please type your answer before submitting.

I think it has no chiral carbon

Karthi Kumar
Shared from SAT Subject (Chemistry) - 2 on May 10, 2017 10:32 PM

Directions: The question below consists of two statements. Each statement in the left-hand column is referred to as I, and each statement in the right-hand column as II. For each question, determine whether I is true or false and whether II is true or false and click on the corresponding True and False oval spaces. If, but only if, statement II is a correct explanation of statement I, click on the oval space labeled CE.

Assertions (I)
Reasons (II)
Under similar conditions of temperature and pressure, O2 diffuses 1.4 times faster than SO2.
BECAUSE
Density of SO2 is 1.4 times greater than that of O2.

 
True
False
CE
Please type your answer before submitting.

How density of SO2 is 1.4 times greater than that of O2? please explain.

Karthi Kumar
Shared from SAT Subject (Chemistry) - 2 on May 10, 2017 10:11 PM

Directions: The question below consists of two statements. Each statement in the left-hand column is referred to as I, and each statement in the right-hand column as II. For each question, determine whether I is true or false and whether II is true or false and click on the corresponding True and False oval spaces. If, but only if, statement II is a correct explanation of statement I, click on the oval space labeled CE.

Assertions (I)
Reasons (II)
B2 molecule is diamagnetic
BECAUSE
The highest occupied molecular orbital is of type

 
True
False

CE

Please type your answer before submitting.

B2 is paramagnetic because it has two unpaired electrons, one in each of its p orbitals.

Karthi Kumar
Shared from SAT Subject (Chemistry) - 1 on May 09, 2017 8:42 PM

For equilibrium in the reaction
H2O (l) H 2O(g) at 1 atm and 298 K,

 
standard free energy change is equal to zero (Go = O)
standard free energy change is less than or equal to zero (Go 0)
standard free energy change is less than zero (Go < 0)
standard free energy change is greater than zero (Go > 0)
free energy change is less than zero (Go < 0)
Please type your answer before submitting.

Can you give a detailed explanation for this question?

Karthi Kumar
Shared from SAT Subject (Chemistry) - 1 on May 09, 2017 8:39 PM

Which of the following reactants will produce precipitates that are sparingly soluble in excess of alkali?

 
Zinc sulphate + Caustic soda
Lead nitrate + Caustic soda
Calcium nitrate + Caustic soda
Copper sulphate + Caustic soda
Ferric chloride + Caustic soda
Please type your answer before submitting.

Can you explain question 59 using chemical equation?