নীলবর্ণের লিটমাস পেপারে কোনটি যোগ করলে লালবর্ণে পরিণত হবে?

Created: 9 months ago | Updated: 9 months ago

N H_{3}

K_{2} C O_{3}

N a_{2} C O_{3}

H_{2} S O_{4}

মাধ্যমিক স্তর অষ্টম শ্রেণি (মাধ্যমিক) বিজ্ঞান অম্ল, ক্ষারক ও লবণ

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অম্ল, ক্ষারক ও লবণ

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লেবুর রস, ভিনেগার, চুন, এন্টাসিড ঔষধ, খাবার লবণ এগুলো আমাদের िপ্রানী প্রম। এদের মধ্যে কোনোটি অম্ল বা এসিড, কোনোটি ক্ষারক থাকার কোনোটি হয়তো লবণ। এদের রাসারনিক ধর্ম ভিন্ন ভিন্ন। ধর্ম অনুযায়ী এদের একেকটি এক এক কাজে ব্যবহৃত হয়ে থাকে।

এই অধ্যায় পাঠ শেষে আমরা-

• অম্ল ও ক্ষারকের বৈশিষ্ট্য ব্যাখ্যা করতে পারব;

• কানের বৈশিষ্ট্য ব্যাখ্যা করতে পারব:

• লবণের বৈশিষ্ট্য ব্যাখ্যা করতে পারব:

• নিরপেক্ষ পদার্থ ব্যাখ্যা করতে পারব;

• পরীক্ষণ কার্যক্রমে যন্ত্রপাতির ব্যবহার সঠিকভাবে করতে পারব;

• আমাদের জীবনে অম্ল, ক্ষার ও লবণের অবদান উপলব্ধি করতে পারব:

• পরীক্ষণ কার্যক্রম চলাকালীন জনী নর সদস্যদের সচেতন করতে পারব।

Content added || updated By

Rezwan Siddiki Tamim

1. Three years ago the government introduced the Youth Training Program to guarantee teenagers leaving school an alternative to the dole. Today, over one hundred thousand 17 and 18 year olds are still signing on for unemployment benefits . Each of the follow

Created: 6 years ago | Updated: 1 year ago

The program provides uninteresting work

It is difficult to find work for all the program's graduates

The number of 17 and 18 year old youths has increased over the past three year

Unemployment benefits are known while future salaries are not

Youths are unaware of the program's benefits

Bangladesh Bank Bangladesh Bank - Assistant Director - 2011 গণিত ট্রেন ও গতিবেগ (Train & Speed)

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0 726

2. An economist was quoted as saying that the cost of living index ( COL ) will go up next month because a recent increase in the price of fruits and vegetables . Which of the following cannot be inferred from the statement ?

Created: 6 years ago | Updated: 1 year ago

The cost of fruits and vegetables has risen sharply

Consumers have decreased their consumption of fruits and vegetables

The cost of fruits and vegetables is a major item in the COL

Other items that make up the COL have not significantly decreased in price

Food cost changes are reflected quickly in the COL

Bangladesh Bank Bangladesh Bank - Assistant Director - 2011 গণিত শতকরা (Percentage)

ব্যাখ্যা Please wait...

0 461

3. The exchange rate is the ruling official rate of exchange of dollars for other currencies . It determines the value of American goods in relation to foreign goods. If the the dollar is devalued in terms of other currencies , American exports ( which are

Created: 6 years ago | Updated: 1 year ago

There are certain disadvantages for the United States economy attached to devaluation

The prospect of devaluation results in a speculative outflow of funds

By encouraging exports and discouraging imports, devaluation can improve the American balance of payments

The difference between the exports and imports is called the trade gap

It is possible that inflation neutralises the beneficial effects of devaluation

Bangladesh Bank Bangladesh Bank - Assistant Director - 2011 গণিত

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0 507

4. A car uses 1 liter of petrol to travel 17 miles. After a tune-up, the car travels 17% farther on one liters. How many liters ( best approximation ) of petrol will it take for the car to travel 170 miles after a tune-up ?

Created: 6 years ago | Updated: 2 years ago

8.1

7.9

9.3

9.1

8.5

Bangladesh Bank Bangladesh Bank - Assistant Director - 2011 গণিত ঐকিক নিয়ম (Unitary method)

ব্যাখ্যা Please wait...

0 653

5. If x + y > 5 and x - y > 3, then which of the following gives all and only possible values of x ?

Created: 6 years ago | Updated: 2 years ago

x < 3

x > 3

x > 4

x < 5

x > 5

Bangladesh Bank Bangladesh Bank - Assistant Director - 2011 গণিত অসমতা (Inequality)

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0 632

নীলবর্ণের লিটমাস পেপারে কোনটি যোগ করলে লালবর্ণে পরিণত হবে?

অম্ল, ক্ষারক ও লবণ

Related Question

1. Three years ago the government introduced the Youth Training Program to guarantee teenagers leaving school an alternative to the dole. Today, over one hundred thousand 17 and 18 year olds are still signing on for unemployment benefits . Each of the follow

2. An economist was quoted as saying that the cost of living index ( COL ) will go up next month because a recent increase in the price of fruits and vegetables . Which of the following cannot be inferred from the statement ?

3. The exchange rate is the ruling official rate of exchange of dollars for other currencies . It determines the value of American goods in relation to foreign goods. If the the dollar is devalued in terms of other currencies , American exports ( which are

4. A car uses 1 liter of petrol to travel 17 miles. After a tune-up, the car travels 17% farther on one liters. How many liters ( best approximation ) of petrol will it take for the car to travel 170 miles after a tune-up ?

5. If x + y > 5 and x - y > 3, then which of the following gives all and only possible values of x ?

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নীলবর্ণের লিটমাস পেপারে কোনটি যোগ করলে লালবর্ণে পরিণত হবে?

অম্ল, ক্ষারক ও লবণ

Related Question

1. Three years ago the government introduced the Youth Training Program to guarantee teenagers leaving school an alternative to the dole. Today, over one hundred thousand 17 and 18 year olds are still signing on for unemployment benefits . Each of the follow

2. An economist was quoted as saying that the cost of living index ( COL ) will go up next month because a recent increase in the price of fruits and vegetables . Which of the following cannot be inferred from the statement ?

3. The exchange rate is the ruling official rate of exchange of dollars for other currencies . It determines the value of American goods in relation to foreign goods. If the the dollar is devalued in terms of other currencies , American exports ( which are

4. A car uses 1 liter of petrol to travel 17 miles. After a tune-up, the car travels 17% farther on one liters. How many liters ( best approximation ) of petrol will it take for the car to travel 170 miles after a tune-up ?

5. If x + y > 5 and x - y > 3, then which of the following gives all and only possible values of x ?

মাধ্যমিক স্তর

Promotion

Download Our Mobile Apps

Satt policy

Main Features

Subscribe our newsletter

Promotion