Email

Chat with tutors

Login

Ask Questions, Get Answers

Menu X

home ask tuition questions practice papers mobile tutors pricing

X

Recent questions tagged jeemain

A water film is formed on a glass-block. A light ray is incident on water film from air at an angle $60^{\circ}$ with the normal. The angle of incidence on glass slabs is $ \bigg[ \: given\: \mu_g = 1.5,\: \mu_W = \large\frac{4}{3} \bigg] $ :

asked Nov 1, 2013 by thanvigandhi_1

1 answer

Two identical flutes produce fundamental notes of frequency 300 Hz at $27^{\circ}C$. If the temperature of the air in one of the flutes is increased to $31^{\circ}C$, the number of beats heard per seconds will be :

asked Nov 1, 2013 by thanvigandhi_1

1 answer

A source of sound producing wavelength 50 cm is moving away from a stationary observer with $ \large\frac{1}{5}th$ speed of sound. Then what is the wavelength of sound heard by the observer?

asked Nov 1, 2013 by thanvigandhi_1

1 answer

The temperature of a perfect black body is $727^{\circ}C$ and its area is $0.1\: m^2$. If Stefan's constant is $ 5.67 \times 10^{-8} W/m^2K^4$, then heat radiated by it in $0.3$ minutes is :

asked Nov 1, 2013 by thanvigandhi_1

1 answer

Two cylinders A and B, fitted with pistons. A and B contain equal moles of an ideal monoatomic gas at 400 K. Piston in A is free to move, while piston in B is held fixed. Same amount of heat is given to the gas in each cylinder. If the rise in temperature of the gas in A is 42 K, then the increase in the temperature of the gas in B is $ \bigg( \gamma = \large\frac{5}{3} \bigg) $:

asked Nov 1, 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

If $|\overrightarrow a|=2,\:|\overrightarrow b|=3\:and\:|\overrightarrow c|=4$ and $\overrightarrow a+\overrightarrow b+\overrightarrow c=\overrightarrow O$, then $\overrightarrow b.\overrightarrow c+\overrightarrow c.\overrightarrow a+\overrightarrow a.\overrightarrow b=?$

asked Oct 30, 2013 by rvidyagovindarajan_1

1 answer

If $\overrightarrow a,\:\overrightarrow b\:and\:\overrightarrow c$ are mutually $\perp$ vectors of equal magnitude then the angle $\theta$ made by $\overrightarrow a+\overrightarrow b+\overrightarrow c$with any one of these 3 vectors is ?

asked Oct 30, 2013 by rvidyagovindarajan_1

1 answer

The sides of a parallelogram are given by vectors $2\hat i+4\hat j-5\hat k$ and $\hat i+2\hat j+3\hat k$. Unit vector along one of the diagonals is given by ?

asked Oct 30, 2013 by rvidyagovindarajan_1

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

Statement (S) : * influenced genes are autosomal genes in both males and females. Reasons (R) : The phenotypic expression of *-influenced genes is different in different sexes, dominant in one *** and recessive in the other.

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Which of the following statements are correct ?

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Match the following

asked Oct 30, 2013 by thanvigandhi_1

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

Match the following with reference to the insects and diseases :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

In the life-cycle of plasmodium vivax some stages may survive for long periods in liver as dormant stages known as :

asked Oct 30, 2013 by thanvigandhi_1

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

In diapsid skull of reptiles, the two temporal fossae are separated by these bones to form the upper temporal bar :

asked Oct 30, 2013 by thanvigandhi_1

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

The joint between carpal and metacarpal of thumb in private mammals is :

asked Oct 30, 2013 by thanvigandhi_1

1 answer

Identify the following structures which are present in dioptrical region of the ommatidium of cockroach :

asked Oct 30, 2013 by thanvigandhi_1

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

Statement (S) : Nematodes exhibit 'cutely'. Reason (R) : In nematodes cell divisions cease near the end of embryonic development so that the number of the cells of the adult is constant.

asked Oct 30, 2013 by thanvigandhi_1

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

Which of the following is not correct ?

asked Oct 30, 2013 by meena.p

1 answer

Which of the products is formed when acetone is reacted with barium hydroxide solution ?

asked Oct 30, 2013 by meena.p

1 answer

Page:

« prev
1
...
279
280
281
282
283
284
285
...
338
next »

Feedback Terms Facebook Twitter About Us

Your payment for is successful.

...