This challenged is designed for staying you in the track of IIT JEE or NEET or Any other UG Exam Preparation. It will also motivate you. I will post 2 to 5 Math & Chemistry Quiz(MCQs) Daily.
Anyone can join
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Question - 1
2 + 1 + ½ + ¼ + ⅛ + …….∞ = ?
a. 8
b. 4
c. 6
d. None of these
Question - 2
The length of the tangent drawn from the point (4,-1) to the circle 2x² + 2y² = 1 is
a. √22 unit
b. √33 unit
c. √99 unit
d. √31 unit
Question -1:
Ans: b. 4
Hint: Sum of infinitely decreasing G.P = a/(1-r)
Here a=2 and r=1/2
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Question 2.
I think all options are wrong, since the radius of the circle is 1/√2. So the answer must contain 1/√2.
Correct answer:
√{(4^2 + (-1)^2) - 1/2} = √(33/2)
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What? I mean if you say physics sucks, I would agree 
but the whole PCB, I don’t think so .
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Nah don’t take it otherwise i love PCB… what i was saying is that here only maths and chem mcqs are being posted… So in that way Biology Stream isn’t getting a fair chance… That’s what i was saying
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@BlackMagic123 btw this reminded me of a mnemonic… Morphology of flowering plants… Pineapple, Chrysanthemum and Banana (PCB) are the examples of suckers (sucks)
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Nice mnemonics…
Please tell me some of your mnemonics
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Is 2 the right answer ?
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I think 3… Inductive effect
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Alright I’ll share some when they’ll occur to me
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Z = re(z) + im(z) is a complex number where re(z) is plotted along or parallel to x-axis and im(z) is plotted along or parallel to y-axis.
For example, If Z = a + ib , then a is plotted as ordinated and b is plotted as abscissa.
Arg(z) is
a. arctan(im(z)/re(z))
b. tan^-1(re(z)/im(z))
c. arcsin(re(z)/im(z))
d. cos^-1(re(z)/im(z))
Answer 3 is correct. Inductive effect.
+I effect destabilises anion as CH2CH3 is an EDG.
+I effect is more in ortho substituted species in benzene rings since it is at less distance from the negative charge.
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Correct answer brother
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Actually I didn’t read the question properly and jumped to conclusion and told the most stable one.
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