Which of them may contain null values?

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Aayush Asked Jan 2

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Two students performed the same experiment separately and each one of them recorded two readings of mass which are given below.

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ALOK_RAJ Asked Nov 19, 2023

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An atom is the smallest particle of an element which many or may not have an ______.

ALOK_RAJ Asked Nov 19, 2023

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LEELADHAR YADAV Asked Sep 5, 2023

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Determine the integral values of ' $k$ ' for which the system, $\left(\tan ^{-1} x\right)^2+\left(\cos ^{-1} y\right)^2=\pi^2 k$ and $\tan ^{-1} x+\cos ^{-1} y=\frac{\pi}{2}$ possess solution and find all the solutions.

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by LEELADHAR YADAV

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LEELADHAR YADAV Asked Sep 3, 2023

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Let $f(x)=\log _2 \log _3 \log _4 \log _6\left(\sin x+a^2\right)$. Find the set of values of a for which domain of $f(x)$ is $R$.

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by LEELADHAR YADAV

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LEELADHAR YADAV Asked Sep 3, 2023

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Let $g: R \rightarrow(0, \pi / 3]$ is defined by $g(x)=\cos ^{-1}\left(\frac{x^2-k}{1+x^2}\right)$. Then find the possible values of ' $k$ ' for which $g$ is surjective.

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by LEELADHAR YADAV

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LEELADHAR YADAV Asked Sep 2, 2023

42 views

Find the values of ' $a$ ' in the domain of the definition of the function, $f(a)=\sqrt{2 a^2-a}$ for which the roots of the equation, $x^2+(a+1) x+(a-1)=0$ lie between $-2 \& 1$.

LEELADHAR YADAV Asked Sep 2, 2023

by LEELADHAR YADAV

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ALOK_RAJ Asked Aug 31, 2023

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The set of values of a for which the point (a-1, a+1) lies outside the circle x2 + y2 = 8 and inside the circle $x^{2}+y^{2}-12 x+12 y-62=0$ is

ALOK_RAJ Asked Aug 31, 2023

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ALOK_RAJ Asked Aug 18, 2023

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Which of the following molarity values of ions in an aqueous solution containing 5.85 % w/v NaCl , 5.55 % w/v CaCl2 and 6% w/v NaOH is/are correct :

ALOK_RAJ Asked Aug 18, 2023

by ALOK_RAJ

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John Michael Asked Sep 24, 2023

196 views

What is null point in electric charges?

John Michael Asked Sep 24, 2023

by John Michael

1 Answer

1 Vote

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Aayush Asked Feb 1

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An organic compound on analysis was found to contain 0.032% of Sulphur by mass. The molecular mass of the compound, if its one molecule contains two Sulphur atoms, is :

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45 views

10 moles of C3O2 do not contain :

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by Aayush

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ALOK_RAJ Asked Nov 19, 2023

50 views

A certain volume of nitrogen contains 3000 molecules at $30^{\circ} C$. How many molecules will it contain if it is heated to $100^{\circ} C$ and the pressure remains the same?

ALOK_RAJ Asked Nov 19, 2023

by ALOK_RAJ

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Chandan Asked Oct 7, 2023

136 views

Hydrogen peroxide and water contain 5.93% and 11.2% of hydrogen respectively. How this data illustrates the law of multiple proportions?

Chandan Asked Oct 7, 2023

by Chandan

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Chandan Asked Oct 7, 2023

201 views

On analysis, it was found that the black oxide of copper, red oxide of copper, litharge, the red oxide of lead and the peroxide of lead contain 79.90%, 88.8%, 92.88%, 90.6% and 86.6% respectively of the metal. Establish the law of multiple proportions with the help of data.

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201 Views

Chandan Asked Oct 6, 2023

174 views

The chloride of a metal M is to contain 20.2% metal. The specific heat of the metal is 0.224.

Chandan Asked Oct 6, 2023

by Chandan

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0 Votes

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Chandan Asked Sep 29, 2023

117 views

1.5276g of CdCl2 was found to contain 0.9367g of cadmium. Calculate the atomic weight of cadmium.

Chandan Asked Sep 29, 2023

by Chandan

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Aayush Asked 21 Hours Ago

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There are various phenomenon of reflection of sound. The reverberation is one of them. In case of reverberation the sound is not distinct and cannot be understood properly.

Aayush Asked 21 Hours Ago

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Aayush Asked Mar 28

36 views

A man bought two cows in Rs. 410 and sold each of them at the same price and thereby gained 15% on one and lost 10% on the other. What was the C.P. of each cow?

Aayush Asked Mar 28

by Aayush

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Barjes Yadav Asked Feb 22

51 views

A large truck and a car, both moving with a velocity of magnitude v, have a head-on collision and both of them come to a halt after that. If the collision lasts for 1 s:

Barjes Yadav Asked Feb 22

by Barjes Yadav

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Dev Yaduvanshi Asked Dec 9, 2023

102 views

What were the primary goals of the 2022 legislation in New Zealand regarding smoking, and how did it plan to achieve them?

Dev Yaduvanshi Asked Dec 9, 2023

by Dev Yaduvanshi

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ALOK_RAJ Asked Nov 28, 2023

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Bakelite is made from phenol and formaldehyde. The initial reaction between them is the example of

ALOK_RAJ Asked Nov 28, 2023

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1 Vote

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ALOK_RAJ Asked Oct 18, 2023

196 views

A resistance of $50 \Omega$ is registered when two electrodes are suspended into a beaker containing a dilute solution of a strong electrolyte such that exactly half of the them are submerged into solution.

ALOK_RAJ Asked Oct 18, 2023

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Saurabh Kumar Verma Asked Jun 2, 2022

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20 teachers of a school either teach Mathematics or Physics. 12 of them teach Mathematics while 4 teach both the subjects. Then, the number of teachers teaching Physics only is

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Shakti Asked Dec 20, 2021

272 views

Sulphur exist in different allotropic forms like S2, S6 and S8 etc. If equal moles of these three forms are taken in separate containers, then the ratio of number of atoms present in them respectively is

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Aayush Asked Feb 22

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Explain why some of the leaves may get detached from a tree if we vigorously shake its branch.

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ALOK_RAJ Asked Dec 19, 2023

56 views

E.q wt. of H2SO4 may be ________.

ALOK_RAJ Asked Dec 19, 2023

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ALOK_RAJ Asked Dec 19, 2023

59 views

E.q. wt. of H3PO4 may be _________

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ALOK_RAJ Asked Dec 9, 2023

95 views

What should be added to the polynomial x2-5x+1, So that 2 may be a zero of the resulting polynomial?

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Dev Yaduvanshi Asked Dec 6, 2023

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What was the total value of ₹2,000 banknotes in circulation on May 19, 2023?

Dev Yaduvanshi Asked Dec 6, 2023

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Dev Yaduvanshi Asked Dec 6, 2023

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Why did the Reserve Bank of India (RBI) initiate the withdrawal of ₹2,000 banknotes in May 2023?

Dev Yaduvanshi Asked Dec 6, 2023

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