Newman Projection

Q. Which of the following is the most stable conformer of butane-2, 3-diol?

1. 
2. 
3. 
4. 

Q. In the Newman projection for 2, 2-dimethylbutane, $X$ and $Y$ can respectively be:

1. $H$ and $H$
2. $H$ and $C_2{H}_5$
3. $C_2{H}_5$ and $H$
4. $C{H}_3$ and $C{H}_3$

Q. Increasing order of stability among the 3 main conformation of 2-fluoroethanol is:

1. gauche, eclipse, anti
2. eclipse, gauche, anti
3. anti, gauche, eclipse
4. eclipse, anti, gauche

Q. The total number of possible isomers for $Pt(N{H}_3{)}_{4}C{l}_{2}B{r}_2$ is:

Q. In the following skew conformation of ethane, $H^{\prime }-C-C-H^{\prime \prime }$ dihedral angle is

1. ${58}^o$
2. ${149}^o$
3. ${120}^o$
4. ${151}^o$

Q. Which of the following is the staggered conformation for rotation about $C_1$ and $C_2$ bond in the following structure?

1. 
2. 
3. 
4. 

Q. The least stable conformation of cyclohexane is the:

1. Chair
2. Half - chair
3. Boat
4. Twisted boat

Q. In the Newman projection formula of the least stable eclipsed form of $n-$butane, which of the following reasons is the cause of its unstability?

1. Due to it low energy
2. Torsional strain
3. Combination of both
4. None of these

Q. In cyclo-$S_6$, the ring adopts ______.

1. Chair form
2. Half-chair form
3. Boat form
4. Twisted boat form

Q. In the Newman projection for 2, 2-dimethylbutane, $X$ and $Y$ can respectively be:

1. $H$ and $H$
2. $H$ and $C_2{H}_5$
3. $C_2{H}_5$ and $H$
4. $C{H}_3$ and $C{H}_3$

Q. Which of the following is the correct structure of staggered newman projection of $C{H}_3-C{H}_3$?

1. 
2. 
3. 
4. 

Q. Which of the following pair represents conformers of same compound?

1. 
2. 
3. Both (a) and (b)
4. None of the above

Q. Which of the following pair represents conformers of same compound?

1. 
2. 
3. Both (a) and (b)
4. None of the above

Q. How many gauche conformations are possible for n-butane?

1. 2
2. 3
3. 4
4. 5

Q. Which of the following is a conformer of 2-methylpentane?

1. 
2. 
3. 
4. None of the above

Q. Which of the following is/are correct representation(s) for 2, 3-dimethylpentane?

1. 
2. 
3. 
4. 

Q. Which of the following is the exact sawhorse projection representation for the following newman projection?

1. 
2. 
3. 
4. 

Q. Which is the stable conformation of the given compound?

1. 
2. 
3. 
4. 

Q. Which of the following is the most stable conformer of butane-2, 3-diol?

1. 
2. 
3. 
4. 

Q. Assertion :$S{O}_3$ has a planar structure. Reason: $S$ atom in $S{O}_3$ is $s{p}^{2}d$ hybridized.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. In the Newman projection for 2, 2-dimethylbutane, $X$ and $Y$ can respectively be:

1. $H$ and $H$
2. $H$ and $C_2{H}_5$
3. $C_2{H}_5$ and $H$
4. $C{H}_3$ and $C{H}_3$

Q. Which of the following is the exact sawhorse projection representation for the following newman projection?

1. 
2. 
3. 
4. 

Q. The most stable conformational isomer of given compound will be

1. 
2. 
3. 
4. 

Q. Assertion :The two $-C{H}_2$ groups in $C_2{H}_4$ do not rotate freely around the bond connecting them, although the two $-C{H}_3$ groups in $C_2{H}_6$ have almost an unhindered rotation around the C - C bond. Reason: $C_2{H}_4$ has $\pi$ bond and the overlap of the atomic p-orbitals making up this bond would be destroyed if the $-C{H}_2$ groups rotate.

1. Assertion is true, Reason is true and Reason is correct explanation for Assertion
2. Assertion is true, Reason is true and Reason is NOT the correct explanation for Assertion
3. Assertion is true, Reason is false
4. Assertion is false, Reason is true

Q. Most stable conformation of 1-isopropyl-4-methylcyclohexane is:

1. 
2. 
3. 
4. 

Q. In the Newman projection formula of the least stable eclipsed form of $n-$butane, which of the following reasons is the cause of its unstability?

1. Due to it low energy
2. Torsional strain
3. Combination of both
4. None of these

Q. Consider $2-$methylpropane (isobutane). Sighting along $C_1-C_2$ bond:
If a methayl-hydrogen interaction costs $5.85kJmo{l}^{-1}$ and a hydrogen-hydrogen interaction costs $4.18kJmo{l}^{-1}$ of energy, calculate the energy difference between these conformation.

Q. Draw the Sawhorse and Newman projections for the staggered and eclipsed conformations of ethane.
Discuss their relative stability. Can these conformations bne separated ? If not, then why?

Q. Total number of diamond unit cells in $1.2$ g of diamond sample is :

1. $6.0\times {10}^{21}$
2. $7.5\times {10}^{21}$
3. $6.0\times {10}^{22}$
4. $5.0\times {10}^{22}$

Q.

Newman representation of staggered propane is:

1. 

2. 

3. 

4.