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Recent questions tagged ch12

If $\overrightarrow a,\overrightarrow b,\overrightarrow c$ are position vectors of three non collinear points $A,B,C$ respectively, then the shortest distance of $A$ from $BC$ is ?

asked Jan 5, 2014 by rvidyagovindarajan_1

1 answer

The distance of the point $(1,1,1) $ from the plane passing through the points $(2,1,1),\:(1,2,1)\:and\:(1,1,2)$ is ?

asked Jan 5, 2014 by rvidyagovindarajan_1

1 answer

If $O$ is origin, $|\overrightarrow{OP}|=3$ with $d.r.=(-1,2,-2)$ then the coordinate of $P$ is ?

asked Jan 3, 2014 by rvidyagovindarajan_1

2 answers

If $P(x,y,z)$ is a point on the line segment joining $Q(2,2,4)\:\:and\:\:R(3,5,6)$ such that the projections of $\overrightarrow {OP}$ on the coordinate axes are $\large\frac{13}{5},\frac{19}{5},\frac{26}{5}$ respectively, then $P$ divides $QR$ in the ratio ?

asked Jan 3, 2014 by rvidyagovindarajan_1

1 answer

If $P$ is a point in space such that $OP=12$ and $\overrightarrow {OP} $ is inclined with angle $45^{\circ} $ with $OX$ and $60^{\circ}$ with $OY$ then the coordinates of $P$ is ?

asked Jan 3, 2014 by rvidyagovindarajan_1

1 answer

If $P(3,2,-4),\:Q(5,4,-6)\:and\:R(9,8,-10)$ are collinear,then $R$ divides $PQ$ in ratio?

asked Jan 3, 2014 by rvidyagovindarajan_1

1 answer

The point on the line $\overrightarrow r=(-2\hat i-\hat j+3\hat k)+\lambda(3\hat i+2\hat j+2\hat k)$ which is at a distance of $3\sqrt 2$ units from the point $(1,2,3)$ is ?

asked Jan 1, 2014 by rvidyagovindarajan_1

1 answer

Consider the following reaction of 1-methyl cyclohexene with NBS.Four likely products of the reaction are shown below. One of the likely product is not shown however

asked Dec 5, 2013 by sreemathi.v

1 answer

Reactant B of the reaction is

asked Dec 5, 2013 by sreemathi.v

1 answer

The reactivity of which H atom is maximum for Halogenation by free radical mechanism?

asked Dec 5, 2013 by sreemathi.v

1 answer

Refer to the below reaction :

asked Dec 5, 2013 by sreemathi.v

1 answer

Reaction of 1 molr of each $Br_2$ and phco$CH_2CH_3$ in basic solution yields 0.5 moles of ph$COCBr_2CH_3$ And 0.5 moles of unreacted ph$COCH_2CH_3$. It suggests:

asked Dec 5, 2013 by sreemathi.v

1 answer

Which radical is responsible for the observed selectivity in the following selectivity in the following chain reaction ?

asked Dec 5, 2013 by sreemathi.v

1 answer

DImerisation product of cyclhexene under acidic conditions is

asked Dec 5, 2013 by sreemathi.v

1 answer

Which alkene when treated with benzene in presence of $H^+$ gives 1,1 diphenylethane

asked Dec 5, 2013 by sreemathi.v

1 answer

Bromination of carbonyl compound at $\alpha$ position is

asked Dec 5, 2013 by sreemathi.v

1 answer

Refer to the below equation :

asked Dec 5, 2013 by sreemathi.v

1 answer

Which of the following is likely mechanism for the transformation shown below?

asked Dec 5, 2013 by sreemathi.v

1 answer

Which is the least likely protonation site in the conjugated alkene given below:

asked Dec 5, 2013 by sreemathi.v

3 answers

Refer to the below reaction:

asked Dec 5, 2013 by sreemathi.v

1 answer

What is the most likely product of the following reaction?

asked Dec 5, 2013 by sreemathi.v

1 answer

Refer to the below equation :

asked Dec 5, 2013 by sreemathi.v

1 answer

Refer to the below reaction :

asked Dec 5, 2013 by sreemathi.v

1 answer

Refer to the below reaction :

asked Dec 5, 2013 by sreemathi.v

1 answer

An aromatic alkyne on treatment with $H_2SO_4$ gives acetophenone .The alkyne is

asked Dec 5, 2013 by sreemathi.v

1 answer

An alkyne on treatment with cold alkaline $KMnO_4$ gives $2-oxo$ propanal. Alkyne is

asked Dec 5, 2013 by sreemathi.v

1 answer

Refer to the below reaction:

asked Dec 5, 2013 by sreemathi.v

1 answer

Refer to the below reaction :

asked Dec 5, 2013 by sreemathi.v

1 answer

A type of fuel containing

asked Dec 4, 2013 by sreemathi.v

1 answer

Alkanes containing 6 or more carbon atoms catalytically treated under pressure, passed over chromic oxide carried on an alumina support at temperature ranging 480-550 degree C,eventually

asked Dec 4, 2013 by sreemathi.v

1 answer

Which of the following alkene is most reactive towards epoxidation with MCPBA (meta chloro per benzoic acid)

asked Dec 4, 2013 by sreemathi.v

1 answer

Refer to the below reaction:

asked Dec 4, 2013 by sreemathi.v

1 answer

Refer to the below reaction :

asked Dec 4, 2013 by sreemathi.v

1 answer

Refer to the below reaction :

asked Dec 4, 2013 by sreemathi.v

1 answer

Which of the following is most reactive diene?

asked Dec 4, 2013 by sreemathi.v

1 answer

Some alkanes may be prepared by adding an alkyl iodide dropwise to sodium in a suitable inert solvent

asked Dec 4, 2013 by sreemathi.v

1 answer

Find out the valid statement

asked Dec 4, 2013 by sreemathi.v

1 answer

Refer to the below equation :

asked Dec 4, 2013 by sreemathi.v

1 answer

Which of the following statement is correct regarding the molecule A

asked Dec 4, 2013 by sreemathi.v

1 answer

Which of the following alkanes can be synthesized by Wurtz reaction in good yield?

asked Dec 4, 2013 by sreemathi.v

1 answer

Which of the following alkanes will give single product with a methele insertion?

asked Dec 4, 2013 by sreemathi.v

1 answer

Refer to the below reaction :

asked Dec 4, 2013 by sreemathi.v

1 answer

Refer to the below reaction:

asked Dec 4, 2013 by sreemathi.v

1 answer

An unknown compound decolourises bromine in carbon tetrachloride and it undergoes catalytic reduction to give decalin. When treated with warm, concentrated potassium permangate, this compound give cis-cyclohexane-1,2- dicarboxylic acid and oxalic acid. Propose a structure for the unknown compound.

asked Dec 4, 2013 by sreemathi.v

1 answer

Refer to the below equation :

asked Dec 4, 2013 by sreemathi.v

1 answer

Refer to the below reaction :

asked Dec 4, 2013 by sreemathi.v

1 answer

Refer to the below equation:

asked Dec 4, 2013 by sreemathi.v

1 answer

Identify the product

asked Dec 4, 2013 by sreemathi.v

1 answer

Refer to the below equation :

asked Dec 3, 2013 by sreemathi.v

1 answer

Refer to the below reaction :

asked Dec 3, 2013 by sreemathi.v

1 answer

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