Recent questions tagged 79

Which of the following acts as a circuit protection device?

asked Jul 8, 2019 by pady_1

1 answer

The number of moles of $AgCl$ precipitated when excess $AgNO_3$ is added to one mole of $[Cr(NH_3)_4Cl_2]Cl$ is :

asked Dec 19, 2018 by pady_1

0 answers

Which of the following is used as a rocket fuel ?

asked Dec 19, 2018 by pady_1

0 answers

In the Castner's process of extraction of sodium, cathode is :

asked Dec 19, 2018 by pady_1

0 answers

Consider the following reaction : $C_6H_5NO_2 \xrightarrow{Sn/HCl} X \xrightarrow{C_6H_5COCl} Y + HCl$ What is $Y$?

asked Dec 11, 2018 by pady_1

0 answers

$KO_2$ is used in space and submarines because it :

asked Dec 11, 2018 by pady_1

0 answers

How many unit cells are present in a cube shaped ideal crystal of $NaCl$ of mass $1.00\;g$ ? [Atomic masses : Na = 23, Cl = 35.5]

asked Dec 11, 2018 by pady_1

0 answers

When metal 'M' is treated with NaOH, a white gelatinous precipitate 'X' is obtained, which is soluble in excess of NaOH. Compound 'X' when heated strongly gives an oxide which is used in chromatography as an adsorbent. The metal M is :

asked Dec 11, 2018 by pady_1

0 answers

Which of the following compounds will form significant amount of meta product during mono-nitration reaction ?

asked Dec 11, 2018 by pady_1

0 answers

The centres of those circles which touch the circle, $x^2+y^2−8x−8y−4=0$, externally and also touch the x-axis, lie on :

asked Dec 11, 2018 by pady_1

1 answer

Let $L$ be the line passing through the point $P(1, 2)$ such that its intercepted segment between the co-ordinate axes is bisected at $P$. If $L_1$ is the line perpendicular to $L$ and passing through the point $(-2, 1)$, then the point of intersection of $L$ and $L_1$ is :

asked Dec 11, 2018 by pady_1

1 answer

For the non â€“ stoichiometre reaction $2A +B \to C + D$ , the following kinetic data were obtained in three separate experiments, all at $298\; K$. The rate law for the formation of C is:

asked Dec 11, 2018 by pady_1

0 answers

Two capacitors $C_1$ and $C_2$ are charged to 120 V and 200 V respectively. It is found that by connecting them together the potential on each one can be made zero. Then :

asked Dec 11, 2018 by pady_1

0 answers

The electrons identified by quantum numbers n and I : (a) n = 4, I = 1 (b) n = 4, I = 0 (c) n = 3, I = 2 (d) n = 3, I = 1 Can be placced in order of increasing energy as :

asked Dec 11, 2018 by pady_1

0 answers

Which of the following statement is wrong ?

asked Dec 11, 2018 by pady_1

0 answers

The number of complex number $z$ such that $|z-1| = | z+ 1| = |z-i|$ equals

asked Dec 11, 2018 by pady_1

0 answers

The sum of the infinity of the series $1 + \frac{2}{3} + \frac{6}{3^2} + \frac{10}{3^3}+\frac{14}{3^4} + . . . . $ is

asked Nov 29, 2018 by pady_1

0 answers

The dimension of magnetic field in M, L, T and C (Coulomb) is given as

asked Nov 29, 2018 by pady_1

0 answers

When a system is taken from state $i$ to state $f$ along the path $iaf$, it is found that $Q=50 \;cal$ and $W=20\; cal$. Along the path $ibf$ Q = 36 cal. W along the path $ibf$ is :

asked Nov 29, 2018 by pady_1

1 answer

Which of the following statement is true ?

asked Nov 13, 2018 by pady_1

0 answers

Which one of the following species is diamagnetic in nature ?

asked Nov 5, 2018 by pady_1

0 answers

The wavelength of the radiation emitted, when in hydrogen atom electron falls from infinity to stationary state , would be (Rydberg constant = $1.097 \times 10^7\; m^{-1}$)

asked Nov 5, 2018 by pady_1

1 answer

Compound A, $C_8 H_{10}O$, is found to react with $NaOI$ (produced by reacting Y with NaOH) and yield a yellow precipitate with characteristic smell. A and Y are respectively

asked Aug 21, 2018 by pady_1

1 answer

Life cycle of Ectocarpus and Fucus respectively are :

asked Aug 21, 2018 by pady_1

1 answer

Which part of the tobacco plant is infected by Meloidogyne incognita ?

asked Aug 21, 2018 by pady_1

2 answers

During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by -

asked Aug 21, 2018 by pady_1

1 answer

Which of the following hormones is produced under the condition of stress which stimulates glycogenolysis in the liver of human being?

asked Aug 20, 2018 by pady_1

1 answer

Among the following ethers, which one will produce methyl alcohol on treatment with hot concentrated HI ?

asked Aug 20, 2018 by pady_1

1 answer

In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with :

asked Aug 20, 2018 by pady_1

1 answer

Which one of the following is present as an active ingredient in bleaching powder for bleaching action ?

asked Aug 16, 2018 by pady_1

1 answer

Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is :

asked Jul 26, 2018 by pady_1

1 answer

Out of $TiF_6^{2-}$and $CoF_6^{3-}$ , $Cu_2Cl_2$ and $NiCl_4^{2-}$ (Z of Ti = 22, Co = 27, Cu = 29, Ni = 28) the colourless species are : -

asked Jul 26, 2018 by pady_1

1 answer

The angular shape of ozone molecule$(O_3)$ consists of -

asked Jul 26, 2018 by pady_1

1 answer

Which of the following oxidation states are the most characteristic for lead and tin respectively:

asked Jul 26, 2018 by pady_1

1 answer

$[CO(NH_3)_4(NO_2)_2]Cl$ exhibits:-

asked Jul 25, 2018 by pady_1

1 answer

At $25^oC$, the dissociation constant of a base, BOH, is $1.0\times10^{-12}$ The concentration of hydroxyl ions in 0.01M aqueous solution of the base would be :-

asked Jul 24, 2018 by pady_1

0 answers

Aniline when diazotized in cold and then treated with dimethyl aniline gives a coloured product. Its structure would be :-

asked Jul 24, 2018 by pady_1

1 answer

The e.m.f. of a Daniell cell at 298 K is $E_1$. $Zn/SO_4(0.01 M) || CuSO_4(1.0 M)/Cu$ When the concentration of $ZnSO_4$ is 1.0 M and that of $CuSO_4$ is 0.01 M, the e.m.f. is changed to $E_2$. What is the relationship between $E_1$ and $E_2$ :

asked Jul 24, 2018 by pady_1

1 answer

The hypothetical complex chloro diaquatriammine cobalt (III) chloride can be represented as : -

asked Jul 23, 2018 by pady_1

1 answer

Which is not correct regarding the adsorption of a gas on surface of solid: -

asked Jul 20, 2018 by pady_1

1 answer

Shape of $Fe{(CO)_5}$ is :

asked Jul 20, 2018 by pady_1

1 answer

1% solution of other compound is isotonic with 5% sucrose (sugar) solution. Then molecular wt. of compound will be :

asked Jun 15, 2018 by pady_1

1 answer

Which of the following is different from others ?

asked Dec 31, 2015 by pady_1

1 answer

Tammy recorded the amount of time she spent on six activities over a twenty four hour period and drew a bar graph, as follows: If Tammy had drawn a pie chart instead, what would have been the approximate angle for the time Tammy spent at school?

asked Dec 31, 2015 by pady_1

1 answer

Find the area of a square of side 60 m.

asked Dec 31, 2015 by pady_1

1 answer

In Luca's grade, $\large\frac{2}{3}$ of the students have a sister. Of the students who have a sister, $\large\frac{1}{2}$ also have a brother. What fraction of the students in Luca's grade have both a sister and a brother?

asked Dec 31, 2015 by pady_1

1 answer

Richa deposits \$ 5400 and got back an amount of \$ 6000 after a year. Find the simple interest he got.

asked Dec 31, 2015 by pady_1

0 answers

integrate : $\int \large\frac{1}{\sin ^2 x \cos ^2 x } $$dx$

asked Dec 18, 2013 by meena.p

1 answer

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