Email

Chat with tutors

Login

Ask Questions, Get Answers

Menu X

home ask tuition questions practice papers mobile tutors pricing

X

Recent questions tagged chemistry

If the values of $\land_{\infty}$ of $ NH_4CI,NaOH\: and \: NaCI$ are 130, 217 and 109 $ohm^{-1}\: .\: cm^2\: .\: equiv^{-1}$ respectively, the $ \land_{\infty}$ of $NH_4OH$ in $ ohm^{-1}\: .\: cm^2\: .\: equiv^{-1}$ is :

asked Nov 5, 2013 by thanvigandhi_1

1 answer

Match the following

asked Nov 5, 2013 by thanvigandhi_1

1 answer

The volume in ml. of 0.1 M solution of NaOH required to completely neutralize 100 ml. of 0.3 M solution of $H_3PO_3$ is :

asked Nov 5, 2013 by thanvigandhi_1

1 answer

Which one of the following is an artificial sweetening agent ?

asked Nov 5, 2013 by thanvigandhi_1

1 answer

Which one of the following statement is not correct?

asked Nov 5, 2013 by thanvigandhi_1

1 answer

Which one of the following is not a biopolymer?

asked Nov 5, 2013 by thanvigandhi_1

1 answer

Nitrobenzene on reduction using Zinc in alkaline medium results in 'X'. The number of sigma $ ( \sigma)$ and pi $ \pi$ bonds in 'X' is :

asked Nov 5, 2013 by thanvigandhi_1

1 answer

The $pK_q$ values of four carboxylic acid are 4.76, 4.19, 0.23 and 3.41 respectively. The $pK_a$ value of strongest carboxylic acid among them is :

asked Nov 5, 2013 by thanvigandhi_1

1 answer

The reagent used in the Wolff - Kishner reduction is :

asked Nov 5, 2013 by thanvigandhi_1

1 answer

The order of reactivity of Phenol (1), Nitrobenzene (2) and Benzene (3) towards nitration is :

asked Nov 5, 2013 by thanvigandhi_1

1 answer

Phosgene is formed slowly from which one of the following on exposure to air and sunlight?

asked Nov 5, 2013 by thanvigandhi_1

1 answer

Which one of the following exhibits enantiomerism ?

asked Nov 5, 2013 by thanvigandhi_1

0 answers

If $f: R \to R$ is defined by $f(x)= \left\{ \begin{array}{1 1} x+4 & \quad for & \quad x < -4 \\ 3x+2 & \quad for & \quad -4 \leq x < 4 \\ x-4 & \quad for & \quad x \geq 4 \end{array}. \right. $ then the correct matching of List I from List II is :

asked Nov 5, 2013 by meena.p

1 answer

The number of sigma and pi $(\pi)$ bonds presents in benzene respectively are :

asked Nov 5, 2013 by meena.p

1 answer

$CH_3CH_2OH \longrightarrow CH_3CHO \longrightarrow Cl_3CCHO $ In above reactions the role of $Cl_2$ in step -I and Step-2 respectively is :

asked Nov 5, 2013 by meena.p

1 answer

Which of the following reactions does not liberate gaseous product?

asked Nov 5, 2013 by meena.p

0 answers

Eithyl chloride reacts with sodium ethoxide to form a compound A. Which of the following reactions also yields A?

asked Nov 5, 2013 by meena.p

1 answer

What are the metal ions present in carnallite?

asked Nov 5, 2013 by meena.p

1 answer

$C_6H+6+O_3 \longrightarrow \: \: \: X \: \: \: \underrightarrow{Zn/H_2O} \: \: \: Y$

asked Nov 4, 2013 by thanvigandhi_1

1 answer

A mixture of $HCOOH$ and $H_2C_2O_4$ is heated with Conc.$H_2SO_4$.The gas produced is collected and on treating with KOH solution the volume of the gas decreases by $\large\frac{1}{6}$th.Calculate molar ratio of two acids in original mixture.

asked Oct 31, 2013 by sreemathi.v

1 answer

What would be the molality of a solution obtained by mixing equal volumes of 30% by weight $H_2SO_4$ ($d=1.218gml^{-1}$) and 70% by weight $H_2SO_4$ ($d=1.610gml^{-1}$)?If the resulting solution has density 1.425g/ml,calculate its molarity.

asked Oct 31, 2013 by sreemathi.v

1 answer

The vapour density of a mixture containing $NO_2$ and $N_2O_4$ is 38.3 at $27^{\large\circ}C$.Calculate the mole of $NO_2$ in 100g mixture

asked Oct 31, 2013 by sreemathi.v

1 answer

To 50litre of 0.2N NaOH ,5litre of 1N HCl and 15litre of 0.1N $FeCl_3$ solution are added .What weight of $Fe_2O_3$ can be obtained from the precipitate?Also report the normality of NaOH left in the resultant solution.

asked Oct 31, 2013 by sreemathi.v

1 answer

Calculate molarity of water $(d_{H_2O}=1gml^{-1})$

asked Oct 31, 2013 by sreemathi.v

1 answer

Calculate molality of 1L solution of 93% $H_2SO_4$ by volume .The density of solution is 1.84g/ml

asked Oct 31, 2013 by sreemathi.v

1 answer

What is the purity of conc $H_2SO_4$ solution (specific gravity 1.8g/ml),if 5ml of this solution is neutralized by 84.6ml of $2.0N\;NaOH$

asked Oct 31, 2013 by sreemathi.v

1 answer

What volume at NTP of ammonia gas will be required to be passed into 30ml of $NH_2SO_4$ solution to bring down the acid normality to 0.2N

asked Oct 31, 2013 by sreemathi.v

1 answer

Pottassium selenate is isomorphous with potassium sulphate and contains 45.42% selenium by weight.Calculate the atomic weight of selenium.Also report the equivalent weight of potassium selenate.

asked Oct 31, 2013 by sreemathi.v

1 answer

What volume of 0.20M $H_2SO_4$ is required to produce 34.0g of $H_2S$ by the reaction: $8KI+5H_2SO_4\rightarrow 4K_2SO_4+4I_2+H_2S+4H_2O$

asked Oct 31, 2013 by sreemathi.v

1 answer

20ml of 0.2M $Al_2(SO_4)_3$ is mixed with 20ml of 0.6M $BaCl_2$.Calculate the concentration of each ion in solution.

asked Oct 31, 2013 by sreemathi.v

1 answer

What volume of a solution of hydrochloric acid containing 73g of acid per litre would sufficient for the exact neutralization of sodium hydroxide obtained by allowing 0.46g of metallic sodium to act upon water ?

asked Oct 31, 2013 by sreemathi.v

1 answer

What volume of water is required to make 0.2N solution from 1600ml of 0.205N solution ?

asked Oct 31, 2013 by sreemathi.v

1 answer

The formula weight of an acid is 82.0.$100cm^3$ of a solution of this acid containing 39.0g of the acid per litre were completely neutralized by $95.0cm^3$ of aqueous NaOH containing 40.0g of NaOH per litre.What is the basicity of the acid?

asked Oct 31, 2013 by sreemathi.v

1 answer

Calculate the normality of the resulting solution made by adding 2drops(0.1ml) of 0.1N $H_2SO_4$ in 1litre of distilled water.

asked Oct 31, 2013 by sreemathi.v

1 answer

What is the strength in g per litre of a solution $H_2SO_4$,12ml of which neutralized 15ml of W/10 of NaOH solution?

asked Oct 31, 2013 by sreemathi.v

1 answer

How many milliliter of 0.5M $H_2SO_4$ are needed to dissolve 0.5g of copper II carbonate?

asked Oct 31, 2013 by sreemathi.v

1 answer

Calculate the weight of iron which will be converted into its oxide by the action of 18g of steam

asked Oct 31, 2013 by sreemathi.v

1 answer

Hydrolysis of $NCl_3$, gives $NH_3$ and X. Which of the following is X?

asked Oct 30, 2013 by meena.p

1 answer

When compound X is oxidised by acidified potassium dichromate, compound Y id formed. Compound Y on reduction with $LiA | H_4$ gives X.X and Y respectively are :

asked Oct 30, 2013 by meena.p

1 answer

Assertion (A) : A current of 96.5 A is passed into aqueous $AgNO_3$ solution for 100 s. The weight of silver deposited is $10.8\;g$ (At . wt. of Ag=108). Reason (R): The mass of a substance deposited during the electrolysis of an electrolyte is inversely proportional to the quantity of electricity passing through the electrolyte.

asked Oct 30, 2013 by meena.p

1 answer

Which of the following reacts with benzene in presence of anhydrous aluminium chloride and forms acetophenone ?

asked Oct 30, 2013 by meena.p

1 answer

Identify the reaction for which $\Delta H= \Delta E$

asked Oct 30, 2013 by meena.p

1 answer

Which of the following compounds when heated with $CO$ at $150^{\circ}C$ and 500 atm pressure in presence of $BF_3$ forms ethyl propionate?

asked Oct 30, 2013 by meena.p

1 answer

Observe the following statements:

asked Oct 30, 2013 by meena.p

1 answer

What is the correct order of occurrence (% by weight) in air of Ne, Ar and Kr?

asked Oct 30, 2013 by meena.p

1 answer

$Mg(OH)_2$ in the form of milk of magnesia is used to neutralize excess stomach acid .How many moles of stomach acid can be neutralized by 1g of $Mg(OH)_2$? (Molar mass of $Mg(OH)_2=58.33)$

asked Oct 30, 2013 by sreemathi.v

1 answer

Match the following lists:

asked Oct 30, 2013 by meena.p

1 answer

Calculate the number of atoms of oxygen present in 88g $CO_2$.What would be the weight of CO having the same no of oxygen atoms ?

asked Oct 30, 2013 by sreemathi.v

1 answer

The volume - temperature graphs of a given mass of an ideal gas at constant pressures are shown below. What is the correct order of pressures?

asked Oct 30, 2013 by meena.p

1 answer

when acetaldehyde is heated with Fehling solution, a red precipitate is formed. Which of the following is that?

asked Oct 30, 2013 by meena.p

1 answer

Page:

« prev
1
...
378
379
380
381
382
383
384
...
393
next »

Feedback Terms Facebook Twitter About Us

Your payment for is successful.

...