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Which of the following statements are true? Statement 1: Electronic configuration of sodium is 1s22s22p63s1. Statement 2: Electronic configuration of sodium ion is 1s22s22p6.

Correct Answer: Statement 1 and statement 2, both are true
The electronic configuration of neutral sodium atom is 1s22s22p63s1, where one electron is more than the closed p subshell so, sodium gives up the valence electron and therefore the electron configuration of sodium ion is 1s22s22p6, giving Na a positive charge and it becomes Na+.

Measurement of KLa in a bioreactor can be carried out by sodium sulfite oxidation method, that is, based on the oxidation of sodium sulfite to sodium sulfate in the presence of a catalyst (Cu++ or Co++). In a typical experiment, a laboratory fermenter was filled with 5 liter of 0.5 M sodium sulfite solution containing 0.003 M Cu++ ions and the air was sparged in. After 10 min, the air flow was stopped and a 10 mL sample was taken and titrated. The concentration of sodium sulfite in the sample was found to be 0.20 M. The oxygen uptake rate for this aerated system will work out to be

From an alloy, two specimens are machined and tested separately under tension and compression. The engineering stress-strain curves as well as the true stress-true strain curves for tension and compression are plotted in the same diagram. Identify the correct statements:
P. The engineering stress-strain curves in tension and compression are identical.
Q. The true stress-true strain curve in compression is lower than the true stresstrue strain curve in tension due to Bauschinger effect.
R. The true stress-true strain curve in tension is above the corresponding engineering stress-strain, curve.
S. The true stress-true strain curve in tension and compression are identical.

Which of the following statements regarding group 16 elements is not true? 2s22p4 b) The electronic configuration of Sulphur is 3s23p4 c) The atomic radii of the elements of group 16 are larger than those of the corresponding elements of group 15 d) The electronic configuration of Tellurium is 4d105s25p4

Decomposition of sodium chloride into a sodium ion and chloride ion releases energy of 788 KJ per Mol, what is the energy called?

In Jacob-Hochheiser method, NO2 is passed through a dilute solution of sodium hydroxide forming the nitrite ion. The nitrite ion is reacted with sulphanilamide and ethylene diamine in which of the following to form the highly coloured azo dye?

Read the following statements.
1. Financial statements are only interim reports.
2. Financial statements are prepared on the basis of realisable values.
3. The preparation of financial statements is not an ultimate aim.
4. Certain assumptions are necessary to prepare financial statements.
Which of the following combinations consists of all true statements?

Which of the following option is true for the given statements about electronic gauging systems? Statement 1: Capacitive pick-ups used in electronic gauging systems which make contact with the measuring tip. Statement 2: Arithmetic operation can be carried out on electrical signals.

Which of the following statement(s) is/are correct?
1. If sodium carbonate and washing soda is mixed in water the hardness of water can be removed.
2. The reaction of the chemicals produce sodium sulphate, sodium carbonate and insoluble calcium carbonate.
3. Magnesium sulphate chloride and magnesium carbonate is also produced.
Select the correct answer

In the following question, two statements are given each followed by two conclusions I and II. You have to consider the statements to be true even if theyseem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements. Statements:
(I) Library is a place where one may find any answer to his/her question.
(II) Books in any form whether physical or electronic are advantageous for resolving any kind of query. Conclusion:
(I) Every question has an answer and one can find it in a book.
(II) Books give all related information pertaining to the title they have.

__________ with sodium hydroxide and/or sodium peroxide is utilized to produce the high pH that is crucial to produce the active perhydroxyl ion, HOO–.