Recent questions tagged 91

Which of the following statements is incorrect ?

asked Jul 8, 2019 by pady_1

1 answer

By which of the following reactions can one get N-methyl aniline from aniline ?

asked Dec 19, 2018 by pady_1

1 answer

How many moles of potassium chlorate should be decomposed completely to obtain $67.2\; L$ of oxygen at NTP ?

asked Dec 19, 2018 by pady_1

0 answers

Which of the following is the correct pair ?

asked Dec 19, 2018 by pady_1

0 answers

The r.m.s velocity of $CO_2$ at a temperature $T$ (in kelvin) is $x\; cm\;sec^{-1}$. At what temperature (in kelvin), the r.m.s. velocity of nitrous oxide would be $4x\;cm\;sec^{-1}$ ? (Atomic weights of $C, \; N$ and $O$ are respectively $12, \; 14$ and $16$) :

asked Dec 11, 2018 by pady_1

1 answer

Half-life of a substance A following first order kinetics is 5 days. Starting with 100 g of A, amount left after 15 days is :

asked Dec 11, 2018 by pady_1

0 answers

Which one of the following processes will produce hard water ?

asked Dec 11, 2018 by pady_1

0 answers

91. A student measures the focal length of convex lens by putting an object pin at a distance ‘u’ from the lens and measuring the distance ‘v’ of the image pin. The graph between ‘u’ and ‘v’ plotted by the student should look like

asked Nov 29, 2018 by pady_1

0 answers

The reaction of toluene with $Cl_2$ in presence of $FeCl_3$ gives predominantly :

asked Nov 29, 2018 by pady_1

0 answers

The structure of the major product formed in the following reaction is :

asked Nov 13, 2018 by pady_1

0 answers

Consider the reaction : $N_2 + 3H_2 \to 2NH_3$ carried out at constant temperature and pressure. If $\Delta H$ and $\Delta U$ are the enthalpy and internal energy changes for the reaction, which of the following expressions is true ?

asked Nov 5, 2018 by pady_1

0 answers

Which among the following factors is the most important in making fluorine the strongest oxidizing halogen ?

asked Nov 5, 2018 by pady_1

1 answer

What type of ecological pyramid would be obtained with the following data ? Secondary consumer : 120 g Primary consumer : 60 g Primary producer : 10 g

asked Aug 21, 2018 by pady_1

1 answer

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen ?

asked Aug 21, 2018 by pady_1

2 answers

Which of the following characteristic features always holds true for the corresponding group of animals ?

asked Aug 21, 2018 by pady_1

1 answer

Human urine is usually acidic because -

asked Aug 21, 2018 by pady_1

1 answer

the following shows isogamy with non-flagellated gametes?

asked Aug 20, 2018 by pady_1

1 answer

Select the wrong statement :

asked Aug 20, 2018 by pady_1

1 answer

Deficiency of vitamin $B_1$ causes the disease

asked Aug 20, 2018 by pady_1

1 answer

Which one of the following is most reactive towards electrophilic reagent ?

asked Aug 16, 2018 by pady_1

1 answer

Which one is most reactive towards electrophilic reagent?

asked Jul 26, 2018 by pady_1

1 answer

Which of the following reactions is an example of nucleophilic substitution reaction ?

asked Jul 26, 2018 by pady_1

1 answer

An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be :

asked Jul 26, 2018 by pady_1

1 answer

The order decreasing reactivity towards an electrophilic reagent, for the following : (a) Benzene (b) Toluene (c) Chlorobenzene and (d) Phenol Would be :

asked Jul 26, 2018 by pady_1

2 answers

The correct order of the mobility of the alkali metal ions in aqueous solution is:

asked Jul 25, 2018 by pady_1

1 answer

Products of the following reaction :is are -

asked Jul 24, 2018 by pady_1

0 answers

Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine :-

asked Jul 24, 2018 by pady_1

1 answer

The final product C, obtained in this reaction, would be : <img src =""/>

asked Jul 24, 2018 by pady_1

0 answers

Monomer of
is

asked Jul 23, 2018 by pady_1

1 answer

Which of the following will exhibit maximum ionic conductivity : -

asked Jul 20, 2018 by pady_1

1 answer

At infinite dilution equivalent conductances of $Ba^{+2}$ & $Cl^-$ ions are 127 & $76ohm^{-1}$ $cm^{-1}$ $eq^{-1}$ respectively. Equivalent conductance of $BaCl_2$ at infinite dilutions is :

asked Jul 20, 2018 by pady_1

1 answer

The radius of hydrogen shell is 0.53Å, then in first excited state radius of shell will be :

asked Jun 15, 2018 by pady_1

1 answer

Find the odd one out

asked Dec 31, 2015 by pady_1

1 answer

A die is thrown once. What is the probability that the score is a factor of 6?

asked Dec 31, 2015 by pady_1

0 answers

Find the area of a rectangle whose length is 41 m and breadth is 400 cm.

asked Dec 31, 2015 by pady_1

1 answer

A large box contains 18 small boxes and each small box contains 25 chocolate bars. How many chocolate bars are in the large box?

asked Dec 31, 2015 by pady_1

1 answer

Duration of sunshine in Aligarh city for one week of August 2002 are given as 12.20 hours, 12.18 hours, 12.17 hours, 12.15 hours, 12.13 hours, 12.12 hours, 12.10 hours. Find the average duration of sun shine.

asked Dec 31, 2015 by pady_1

1 answer

Ask Questions, Get Answers

Which of the following statements is incorrect ?

By which of the following reactions can one get N-methyl aniline from aniline ?

How many moles of potassium chlorate should be decomposed completely to obtain $67.2\; L$ of oxygen at NTP ?

Which of the following is the correct pair ?

The r.m.s velocity of $CO_2$ at a temperature $T$ (in kelvin) is $x\; cm\;sec^{-1}$. At what temperature (in kelvin), the r.m.s. velocity of nitrous oxide would be $4x\;cm\;sec^{-1}$ ? <br> (Atomic weights of $C, \; N$ and $O$ are respectively $12, \; 14$ and $16$) :

Half-life of a substance A following first order kinetics is 5 days. Starting with 100 g of A, amount left after 15 days is :

Which one of the following processes will produce hard water ?

91. A student measures the focal length of convex lens by putting an object pin at a distance ‘u’ from the lens and measuring the distance ‘v’ of the image pin. The graph between ‘u’ and ‘v’ plotted by the student should look like

The reaction of toluene with $Cl_2$ in presence of $FeCl_3$ gives predominantly :

The structure of the major product formed in the following reaction is : <br>

Consider the reaction : $N_2 + 3H_2 \to 2NH_3$ carried out at constant temperature and pressure. If $\Delta H$ and $\Delta U$ are the enthalpy and internal energy changes for the reaction, which of the following expressions is true ?

Which among the following factors is the most important in making fluorine the strongest oxidizing halogen ?

What type of ecological pyramid would be obtained with the following data ? <br> Secondary consumer : 120 g <br> Primary consumer : 60 g <br> Primary producer : 10 g

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen ?

Which of the following characteristic features always holds true for the corresponding group of animals ? <br>

Human urine is usually acidic because -

the following shows isogamy with non-flagellated gametes?

Select the wrong statement :

Deficiency of vitamin $B_1$ causes the disease

Which one of the following is most reactive towards electrophilic reagent ?

Which one is most reactive towards electrophilic reagent?

Which of the following reactions is an example of nucleophilic substitution reaction ?

An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be :

The order decreasing reactivity towards an electrophilic reagent, for the following : <br> (a) Benzene <br> (b) Toluene <br> (c) Chlorobenzene and <br> (d) Phenol <br> Would be :

The correct order of the mobility of the alkali metal ions in aqueous solution is:

Products of the following reaction :is are -

Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine :-

The final product C, obtained in this reaction, would be : <br> <img src =""/>

Monomer of
is

Which of the following will exhibit maximum ionic conductivity : -

At infinite dilution equivalent conductances of $Ba^{+2}$ & $Cl^-$ ions are 127 & $76ohm^{-1}$ $cm^{-1}$ $eq^{-1}$ respectively. Equivalent conductance of $BaCl_2$ at infinite dilutions is :

The radius of hydrogen shell is 0.53Å, then in first excited state radius of shell will be :

Find the odd one out

A die is thrown once. What is the probability that the score is a factor of 6?

Find the area of a rectangle whose length is 41 m and breadth is 400 cm.

A large box contains 18 small boxes and each small box contains 25 chocolate bars. How many chocolate bars are in the large box?

Duration of sunshine in Aligarh city for one week of August 2002 are given as 12.20 hours, 12.18 hours, 12.17 hours, 12.15 hours, 12.13 hours, 12.12 hours, 12.10 hours. Find the average duration of sun shine.