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Molarity And Molality Of A Solution Of A Liquid (Mol Wt = 50) In Aqueous Solution Are 9 And 10 Respectively. What Is The Density Of Solution?

Given: The molarity of a solution of a liquid in an aqueous solution is 9 M The molality of a... View Article

If 500Ml Of A Gas A At 1000 Torr And 1000Ml Of Gas B At 800 Torr Are Placed In A 2L Container, The Final Pressure Will Be :

Given: \(\begin{array}{l} P_{A} = 1000 tarr\end{array} \) \(\begin{array}{l} P_{B} = 800 tarr\end{array} \) \(\begin{array}{l} V_{A} = 500 ml\end{array} \) \(\begin{array}{l}... View Article

In Which Pair Of Species, The Octet Rule Is Not Obeyed? (A) Cf4 And Nf3 (B) Nh3 And Ncl3 (C) Bcl3 And Pcl5 (D) Pf3 And Pocl3

The correct answer is (C) Bcl3 And Pcl5 An atom having electrons less than 8 or more than 8 will... View Article

An urn contains 2 white and 2 black balls. a ball is drawn at random, if it is white it is not replaced into urn, otherwise, it is replaced along with another ball of the same colour. the process is repeated. the probability that the third ball drawn is black is 1−k50. Find the value of k

Sol: There are four possibilities First Ball Second Ball Event White White E1 White Black E2 Black White E3 Black... View Article

A Millivoltmeter Of 25 Millivolt Range Is To Be Converted Into An Ammeter Of 25-ampere Range. The Value (In Ohm) Of Necessary Shunt Will Be: (A) 1 (B) 0.01 (C) 0.05 (D) 0.001

The correct answer is (D) 0.001 \(\begin{array}{l} i_{g} = \frac{25 mV}{G} ampere \end{array} \) Where G is the resistance of... View Article

The Following Fig. Shows I-V Graph For A Given Metallic Wire At Two Temperatures T1 And T2.Then, (A)T1 =T2 (B) T2 >T1 (C) T1

The correct answer is (B) T2 >T1 Given: The slope of a I-V graph gives the value of 1/R, as... View Article

Somatostatin Is Produced By

Somatostatin is a peptide hormone that inhibits the release of growth hormone, thyroid-stimulating hormone, prolactin and release of numerous secondary... View Article

What Is The Role Of Depressant In The Froth Floatation Process?

Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic materials. The role of depressant in the froth... View Article

An Ideal Gas Occupies A Volume Of 2M3 At A Pressure Of 3×10 6Pa. The Energy Of The Gas Is:

For an ideal gas, the internal energy is given as: \(\begin{array}{l}E = \frac{f}{2}nRT\end{array} \) \(\begin{array}{l}\Rightarrow \frac{3}{2}nRT\end{array} \) As [pV=nRT] \(\begin{array}{l}E... View Article

Give Reason: Metals Forms Positive Ions.

Metal atoms form positive ions. Because metals are electropositive, which loses electrons and gain a positive charge. Explore more such... View Article

Which Of The Following Instruments Is Used For Measuring Gauge Pressure? A. Manometer B. Barometer C. Hydrometer D. Thermometer

The correct answer is A. Manometer Explore more such questions and answers at BYJU’S.

Simplify (2X+5)(2X−5)

Given (2x + 5)(2x – 5) \(\begin{array}{l} \Rightarrow 2x(2x-5) + 5(2x-5)\end{array} \) \(\begin{array}{l} \Rightarrow 4x^{2} – 10 + 10x –... View Article

At a dinner party every two guests used a bowl of rice between them, every three guests used a bowl of dal between them and every four used a bowl of meat between them. There were altogether 65 dishes. How many guests were present at the party?

Let the total number of guests be x. Number of bowls of dhal = \(\begin{array}{l} \frac{x}{2} \end{array} \) Number of... View Article

The magnetic needle of a tangent galvanometer is deflected at an angle 30 due to a magnet. The horizontal component of earth’s magnetic field 0.34×10⁻⁴T is along the plane of the coil. The magnetic intensity is:

An Angle through which magnet is deflected \(\begin{array}{l} (\Theta ) = 30^{\circ} \end{array} \) The Horizontal Component Of Earth’s Magnetic... View Article

Calculate The Mass Percentage Of Aspirin (C9H8O 4 ) In Acetonitrile (Ch3Cn) When 6.5G Of C 9H 8O4Is Dissolved In 450 G Of Ch 3Cn.

6.5gm of Aspirin (C9H8O4) dissolved in 450gm of Acetonitrile (CH3CN) Mass percent of aspirin = \(\begin{array}{l} \frac {Mass of Aspirin}{Mass... View Article

A Car With Vertical Windshield Moves In A Rainstorm At A Speed Of 40 Km/Hr. The Rain Drops Fall Vertically With A Constant Speed Of 20 M/S. The Angle At Which Raindrops Strike The Windshield

Speed of car = 40 km/hr. \(\begin{array}{l}\Rightarrow 40 * (\frac{5}{18}) \end{array} \) \(\begin{array}{l}\Rightarrow (\frac{100}{9})m/s \end{array} \) \(\begin{array}{l}\Rightarrow tan\Theta =(\frac{v_{c}}{v_{R}}) \end{array}... View Article

The Image Of A Candle Flame Formed By A Lens Is Obtained On A Screen Placed On The Other Side Of The Lens. If The Image Is Three Times The Size Of The Flame And The Distance Between Lens And Image Is 80Cm, At What Distance Should The Candle Be Placed From The Lens? What Is The Nature Of The Image At A Distance Of 80Cm And The Lens?

Magnification is 3 times and image distance v = 80cm Magnification =\(\begin{array}{l} \frac{v}{u} \end{array} \) \(\begin{array}{l} \Rightarrow 3 = \frac{80}{u}... View Article

Psammophytes Are Plants Growing On ____________ Type Of Soil.(A)Sandy (B) Acidic (C) Alkaline (D) Alluvial

The correct answer is (A)Sandy Psammophytes are small-sized plants marked by a number of adaptations, primarily in deserts, shifting sands... View Article

High Classification Accuracy Always Indicates A Good Classifier. True Or False

The given statement is false If the classification is of the highest accuracy, it does not mean the classifier is... View Article

A Car Travels Along A Straight Line For First Half Time With Speed 40Km/Hr And The Second Half Time With Speed 60Km/Hr. Find The Average Speed Of Car.

Given: Speed 1 = 40 Km/h Speed 2 = 60 Km/h Let the total time be t For the first... View Article

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