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What is the harmful effect of presents of alkali in brick earth on bricks?

What is the harmful effect of presents of alkali in brick earth on bricks? Correct Answer Efflorescence

Alkali exists in the form of soda and potash. Alkalis absorb moisture and with a passage of time, it gets evaporated, leaving white powdery deposits called efflorescence.

Related Questions

Each of the question below consists of a question and three statements number I, II and III given below it. You have to decide whether the data provided in the statement are sufficient to answer the question. Two person X and Y together can make 25% of total number of bricks in 4.8 days. Another person Z can make 50 bricks in a day. What is the time taken by person X and Z together to make the total number of bricks? I. Dimensions of a brick is (3cm × 4cm × 5cm) while the dimension of a cuboids when all the bricks are put together is (72cm × 80cm × 50cm) and ratio of number of days taken by X and Y alone to make the total number of bricks is 3 : 2. II. The total number of bricks is 4800 and person Y can make 150 bricks in day. III. Total volume of all the bricks together is 1.008m3 and dimension of a bricks is (5cm × 6cm × 7cm) and time taken by Z to make total number of bricks is 200 % more than the total time taken by person Y to make total number of bricks.
The solid brick shown is made of small square shaped bricks of side 1. when the large brick is disassembled into its component small bricks. the total surface area of all the small bricks is how much greater than the surface area of the large brick?
Statements : Some bricks are trees. All trees are pens. All pens are boats.

Conclusions :
I. Some boats are bricks.
II. Some pens are bricks.
III. Some trees are bricks.
IV. Some bricks are boats.
Consider the following statements related to autoclave bricks: 1. Less water absorption compared to other bricks. 2. Noise reduction 3. It is cheap compared to other types of bricks. 4. Requirement of bulk volume of mortar in joints being relatively less compared to other types of brick masonry. 5. Not recommended for outer walls. Which of the above statements are relevant to the use of ‘autoclave’ bricks?
If the proposition ‘House are not bricks’ is taken to be False then which of the following propositions can be True? (a) All houses are bricks (b) No house is brick (c) Some houses are bricks (d) Some houses are not bricks Select the correct answer from the options given below:
A mason constructs border wall of a house, one wall has 15 rows of bricks & each row has certain number of bricks. If total number of bricks used to construct the border of the house are 900, then how many bricks are there in each row?
Consider the following statements regarding refractory bricks in furnaces: 1. The furnace is fired at temperatures more than 1700°C. 2. Silica content in the soil should be less than 40% 3. Water absorption of bricks should not exceed 10%. 4. Chrome bricks are known as basic bricks. Which of the above statements are correct?
Consider the following statements: 1. IS 3583 refers to Burnt Clay Paving Bricks. 2. IS 5779 refers to Burnt Clay Soling Bricks. 3. IS 3952 refers to Burnt Clay Hollow Bricks. 4. IS 2222 refers to Burnt Clay Lay Bricks. Which of the above statements are correct? 
Which one of the following is not correct about English bond? a) Bricks in one layer are laid on header bond and courses above and below are stretcher bond b) Bricks in one layer are laid on stretcher bond and courses above and below are header bond c) Every layer of bricks is laid on header and stretcher bond d) Bricks layer aligned such that vertical joint is continuous
In each of the following question below are given some statements followed by some conclusions. Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusion logically follows the given statements. Statements: I. Some bricks are stones II. All cakes are bricks Conclusions: I. Some stones are bricks II. Some stones are cakes III. All bricks are stones