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Class 12th

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5 months ago

Class 12th English

The regular mathematics faculty could not teach because of being sick. As a stop gap arrangement different visiting faculty taught different topics on 4 different days in a week. The scheduled time for class was 7:00 am with maximum permissible delay of 20 minutes. The monsoon made the city bus schedules erratic and therefore the classes started on different times on different days.

Mr. Singh didn't teach on Thursday. Calculus was taught in the class that started at 7:20 am. Mr. Chatterjee took the class on Wednesday, but he didn't teach probability. The class on Monday started at 7:00 am, but Mr. Singh didn't teach it. Mr. Dutta didn'

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Payal Gupta

Contributor-Level 10

Professor	Day	Timing	Subject
Mr. Singh	Friday	07:10	Set theory
Mr. Chatterjee	Wednesday	07:20	Calculus
Mr. Dutta	Monday	07:00	Probability
Mr. Banerjee	Thursday	07:05	Ratio and Proportion

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5 months ago

Class 12th Physics

Varying velocity and varying acceleration

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alok kumar singh

Contributor-Level 10

A particle moving with uniform speed in a circular path maintains varying velocity and varying acceleration. It is because direction of both velocity as well as acceleration will change continuously.

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New answer posted

5 months ago

Class 12th Hooghly Engineering and Technology College

Can I get admission in HETC for BTech with 60% in Class 12th?

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Sejal Baveja

Contributor-Level 10

Yes, a candidate can get admission in Hooghly Engineering and Technology College with 60% in Class 12. The minimum required aggregate for BTech admission is 45% (35% for reserved category). Though, candidates must submit the marksheets and certificate of Class 12 to apply for and confirm admission in the college.

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5 months ago

Class 12th Chemistry

Given below are two statements:

Statement I : The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.

Statement II : The nucleophillic addition of hydrogen cyanide to an aldehyde or a ketone yields amine as final product.

In the light of the above statements, choose the most appropriate answer from the options given below:

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alok kumar singh

Contributor-Level 10

Nucleophilic addition of sodium hydrogen sulphite to aldehyde or ketone is a;

$N a H S O_{3} ? N a^{+} + H S O_{3}^{?}$

So; nucleopilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.

Addition of hydrogen cyanide;

Final product is cyanohydrin.

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New answer posted

5 months ago

Class 12th English

Direction for questions 17 to 20:

The bar chart shows average marks obtained in four different subjects for different years at A R Academy. Mark obtained in any subject in any year can be the multiples of five only.

The total average marks in the year 2020 is decreased with respect to the total average marks in year 2014 by

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Vishal Baghel

Contributor-Level 10

(c)

Average marks in 2014 = 280

Average marks in 2020 = 270

Percentage decrease = 3.7%

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5 months ago

Class 12th Chemistry

The oxide without nitrogen-nitrogen bond is:

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alok kumar singh

Contributor-Level 10

All given oxide have nitrogen – nitrogen bond except N₂O₅ as ;

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5 months ago

Class 12th English

Direction for questions 17 to 20:

The bar chart shows average marks obtained in four different subjects for different years at A R Academy. Mark obtained in any subject in any year can be the multiples of five only.

Find the year representing the maximum average marks, combining all the subjects.

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Vishal Baghel

Contributor-Level 10

(c)

Year	Total marks
1994	280
1995	260
1996	260
1997	245
1998	280
1999	295
2000	270

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5 months ago

Class 12th English

Direction for questions 17 to 20:

The bar chart shows average marks obtained in four different subjects for different years at A R Academy. Mark obtained in any subject in any year can be the multiples of five only.

The percentage increase in the average marks in Social science in 2016 with respect to previous year = N% and the percentage increase in the average marks in Biology in 2016 over the previous year = M%. Find M - N

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Vishal Baghel

Contributor-Level 10

(a)

Percentage increase in average marks in social Science in 1996 over the previous year = 14.28%

Percentage increase on average marks in Biology in 1996 over the previous year = 20%

Difference = 20% - 14.28% = 5.72%

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New answer posted

5 months ago

Class 12th English

Direction for questions 17 to 20:

The bar chart shows average marks obtained in four different subjects for different years at A R Academy. Mark obtained in any subject in any year can be the multiples of five only.

Which of the following subjects shows maximum increase in average marks over any two consecutive years?

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Vishal Baghel

Contributor-Level 10

(b)

Maximum increase in average marks is observed for Social Science from 2017 to 2018.

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